diff --git a/api/trading.proto b/api/trading.proto
index f3e2d47..5c88608 100644
--- a/api/trading.proto
+++ b/api/trading.proto
@@ -6,34 +6,18 @@ import "api/pub.proto";
 option go_package = "./pb";
 
 service TradingService {
-    rpc SubIndicator(IndicatorSubReq) returns (stream Indicator); // 订阅指标
     rpc IndicatorSeries(ReqIndicatorSeries) returns (RspIndicatorSeries); // 获取指标序列
     rpc StrategySeries(ReqStrategySeries) returns (RspStrategySeries); // 获取指标序列
     rpc Backtest(ReqBacktest) returns (RspBacktest); // 交易计划回测 
 }
 
-message IndicatorSubReq {
-    string topic  = 1;
-    string instId = 2;
-    int32 window  = 3;
-}
-
-message Indicator {
-    ExchangeType exhcange = 1;
-    string instId = 2;
-    string indicator = 3;
-    string sub = 4; // 指标子标题, MA5, MA10, MA20
-    int64 Ts      = 5;
-    bytes payload = 8;
-}
-
 message ReqIndicatorSeries {
     string indicator = 1;
-    uint32 window = 2; // 指标窗口大小
+    int32 digit = 2; // 结果小数位数
     SeriesRange series = 9;
     google.protobuf.Struct input = 10; // 指标参数
 }
-message RspIndicatorSeries{
+message RspIndicatorSeries {
     repeated double matrix = 1;
     repeated int64 times = 2;
 }
@@ -53,6 +37,6 @@ message ReqBacktest {
     string stime = 2;
     string etime = 3;
 }
-message RspBacktest{
+message RspBacktest {
 
 }
diff --git a/internal/trading/sig/indicator_context.go b/internal/trading/sig/indicator_context.go
index d82966a..35f1b44 100644
--- a/internal/trading/sig/indicator_context.go
+++ b/internal/trading/sig/indicator_context.go
@@ -1,12 +1,24 @@
 package sig
 
 import (
+	"fmt"
 	"sig-pub/pkg/indicator"
 	"sig-pub/pkg/types"
 	"sig-pub/pkg/types/series"
+	"sig-pub/pkg/utils/collect"
 	"sig-pub/pkg/zlog"
+	"slices"
+	"strings"
+
+	"github.com/spf13/cast"
 )
 
+type IndicatorStates map[string]*IndicatorState
+
+func NewIndicatorStates() IndicatorStates {
+	return make(IndicatorStates)
+}
+
 type IOffsetIndicatorContext interface {
 	indicator.IIndicatorContext
 	SetOffset(offset int16)
@@ -17,15 +29,23 @@ type IOffsetIndicatorContext interface {
 // IndicatorContext 指标上下文, 提供k线序列给指标计算使用
 type IndicatorContext struct {
 	IOffsetIndicatorContext
-	input   types.Input
-	kSeries *KlineSeries
-	offset  int16
+	indicator       indicator.IIndicator
+	indicatorsReg   *indicator.IndicatorRegistry
+	input           types.Input
+	indicatorStates map[string]*IndicatorState // {macd{window:0,fast:9,slow:21,single:10}: state} 初始化时与KlineSeries周期同步
+	kSeries         *KlineSeries
+	offset          int16
+	indicatorTrace  []string // 指标调用链避免指标循环引用
 }
 
-func NewIndicatorContext(input types.Input, kSeries *KlineSeries) *IndicatorContext {
+func NewIndicatorContext(indicator indicator.IIndicator, input types.Input, indicatorStates IndicatorStates, kSeries *KlineSeries, indicatorsReg *indicator.IndicatorRegistry) *IndicatorContext {
 	return &IndicatorContext{
-		input:   input,
-		kSeries: kSeries,
+		indicator:       indicator,
+		input:           input,
+		indicatorStates: indicatorStates,
+		kSeries:         kSeries,
+		indicatorsReg:   indicatorsReg,
+		indicatorTrace:  []string{indicator.Meta().Name},
 	}
 }
 
@@ -65,3 +85,81 @@ func (c *IndicatorContext) Series(offset, count int16) (klines series.Klines) {
 	}
 	return ks
 }
+
+// func (c *IndicatorContext) State(effects ...any)
+// 窗口/参数
+// tradingPlan -> interval -> context -> {macd{window:0,fast:9,slow:21,single:10}: state, ema21:state} -> state[[ema]{1.1, 1.2}, [ema]{1.3, 1.4}]
+func (c *IndicatorContext) State() indicator.IIndicatorState {
+	inputs := collect.Mapping(c.indicator.Meta().Input, func(in types.InputArg) string {
+		return c.Input().String(in.Name)
+	})
+	stateKey := fmt.Sprintf("%s{%s}", c.indicator.Meta().Name, strings.Join(inputs, ","))
+
+	state, ok := c.indicatorStates[stateKey]
+	if !ok {
+		state = NewIndicatorState(c.kSeries)
+		c.indicatorStates[stateKey] = state
+		// 从头KlineSeries跑一遍，针对ema,macd等回溯迭代指标
+		c.backtrackIndicatorState(c.indicator)
+	}
+	return state
+}
+
+// 当首次初始化某个state dea后, 把indicator在klineSeries从头跑一遍
+func (c *IndicatorContext) backtrackIndicatorState(indicator indicator.IIndicator) {
+	_offset := c.offset
+	defer c.SetOffset(_offset)
+
+	previousCandles := indicator.CandlePeriods(c)
+	length := c.kSeries.Length()
+	for i := range length {
+		if i < int(previousCandles) {
+			continue
+		}
+		offset := int16(length - 1 - i)
+		c.SetOffset(offset)
+		indicator.Calculate(c)
+	}
+}
+
+// 获取窗口类型指标
+func (c *IndicatorContext) Indicator(name string, args ...any) (series indicator.IIndicatorSeries) {
+	indicator, ok := c.indicatorsReg.Indicator(name)
+	if !ok {
+		panic(fmt.Errorf("indicator %s not exists", name))
+	}
+
+	// 避免循环依赖
+	if slices.Contains(c.indicatorTrace, name) {
+		panic(fmt.Errorf("indicator %s recursive call", name))
+	}
+
+	input := matchIndicatorArgs(args...)
+	indicatorContext := NewIndicatorContext(indicator, input, c.indicatorStates, c.kSeries, c.indicatorsReg)
+	indicatorContext.indicatorTrace = append(c.indicatorTrace, name)
+	return NewWindowIndicatorSeries(indicator, indicatorContext)
+}
+
+func matchIndicatorArgs(args ...any) (input types.Input) {
+inputLoop:
+	for _, arg := range args {
+		switch v := arg.(type) {
+		case types.Input:
+			input = v
+			break inputLoop
+		}
+	}
+windowLoop:
+	for _, arg := range args {
+		switch v := arg.(type) {
+		case int16, int, int32, int64:
+			window := cast.ToInt16(v)
+			if input == nil {
+				input = make(types.Input)
+			}
+			input["window"] = window
+			break windowLoop
+		}
+	}
+	return
+}
diff --git a/internal/trading/sig/indicator_series.go b/internal/trading/sig/indicator_series.go
index 6ba7e3b..394fa9a 100644
--- a/internal/trading/sig/indicator_series.go
+++ b/internal/trading/sig/indicator_series.go
@@ -8,23 +8,25 @@ import (
 // WindowIndicatorSeries 封装
 type WindowIndicatorSeries struct {
 	indicator.IIndicatorSeries
-	window           int16
-	indicator        indicator.IWindowIndicator
+	indicator        indicator.IIndicator
 	indicatorContext IOffsetIndicatorContext
 }
 
-func NewWindowIndicatorSeries(window int16, indicator indicator.IWindowIndicator, indicatorContext IOffsetIndicatorContext) *WindowIndicatorSeries {
+func NewWindowIndicatorSeries(indicator indicator.IIndicator, indicatorContext IOffsetIndicatorContext) *WindowIndicatorSeries {
 	return &WindowIndicatorSeries{
-		window:           window,
 		indicator:        indicator,
 		indicatorContext: indicatorContext,
 	}
 }
 
+func (s *WindowIndicatorSeries) CandlePeriods() int16 {
+	return s.indicator.CandlePeriods(s.indicatorContext)
+}
+
 func (s *WindowIndicatorSeries) Get(offset int16) (vector float64) {
 	// 根据当前相对offset
 	s.indicatorContext.AddOffset(offset)
-	vector = s.indicator.Calculate(s.indicatorContext, s.window)
+	vector = s.indicator.Calculate(s.indicatorContext)
 	// 计算结束后还原
 	s.indicatorContext.AddOffset(-offset)
 	return
@@ -35,7 +37,7 @@ func (s *WindowIndicatorSeries) Series(offset, count int16) (matrix series.Float
 	// 设置当前相对offset
 	s.indicatorContext.AddOffset(offset)
 	for range count {
-		vector := s.indicator.Calculate(s.indicatorContext, s.window)
+		vector := s.indicator.Calculate(s.indicatorContext)
 		matrix.Push(vector)
 
 		offset++
diff --git a/internal/trading/sig/indicator_state.go b/internal/trading/sig/indicator_state.go
new file mode 100644
index 0000000..0bb0bcd
--- /dev/null
+++ b/internal/trading/sig/indicator_state.go
@@ -0,0 +1,47 @@
+package sig
+
+import (
+	"sig-pub/pkg/indicator"
+	"sig-pub/pkg/types"
+	"sig-pub/pkg/types/series"
+)
+
+// IndicatorState
+// ema, obv 指标递归计算时的状态存储
+type IndicatorState struct {
+	indicator.IIndicatorState
+	kSeries *KlineSeries
+	state   map[string]*types.RingSeries[float64]
+}
+
+func NewIndicatorState(kSeries *KlineSeries) *IndicatorState {
+	return &IndicatorState{
+		kSeries: kSeries,
+		state:   make(map[string]*types.RingSeries[float64]),
+	}
+}
+
+func (s *IndicatorState) ring(k string) *types.RingSeries[float64] {
+	ring, ok := s.state[k]
+	if !ok {
+		ring = types.NewRingSeries[float64](indicator.MaxWindow, 8)
+		s.state[k] = ring
+		// 从 kSeries0 开始 calc ind 初始化
+		// 递归初始值
+	}
+	return ring
+}
+
+func (s *IndicatorState) Set(k string, v float64) {
+	s.ring(k).Push(v)
+}
+
+func (s *IndicatorState) Get(k string, offset int16) (v float64, ok bool) {
+	offset -= 1
+	return s.ring(k).Get(int(offset))
+}
+
+func (s *IndicatorState) Series(k string, offset, count int16) (v series.Floats, ok bool) {
+	offset -= 1
+	return s.ring(k).Series(int(offset), int(count))
+}
diff --git a/internal/trading/sig/strategy_context.go b/internal/trading/sig/strategy_context.go
index 389837f..fb562fe 100644
--- a/internal/trading/sig/strategy_context.go
+++ b/internal/trading/sig/strategy_context.go
@@ -11,16 +11,18 @@ import (
 type StrategyContext struct {
 	strategy.ISingleSigStrategyContext
 
-	input         types.Input
-	kSeries       *KlineSeries
-	indicatorsReg *indicator.IndicatorRegistry
+	input                  types.Input
+	kSeries                *KlineSeries
+	indicatorsReg          *indicator.IndicatorRegistry
+	indicatorContextStates IndicatorStates
 }
 
 func NewStrategyContext(input types.Input, kSeries *KlineSeries, indicatorsReg *indicator.IndicatorRegistry) *StrategyContext {
 	return &StrategyContext{
-		input:         input,
-		kSeries:       kSeries,
-		indicatorsReg: indicatorsReg,
+		input:                  input,
+		kSeries:                kSeries,
+		indicatorsReg:          indicatorsReg,
+		indicatorContextStates: NewIndicatorStates(),
 	}
 }
 
@@ -38,35 +40,32 @@ func (c *StrategyContext) Series(offset, count int16) (klines series.Klines) {
 }
 
 // 获取窗口类型指标
-func (c *StrategyContext) IndicatorW(name string, window int16, args ...any) (s indicator.IIndicatorSeries) {
-	indicator, ok := c.indicatorsReg.IndicatorW(name)
+func (c *StrategyContext) Indicator(name string, args ...any) (s indicator.IIndicatorSeries) {
+	indicator, ok := c.indicatorsReg.Indicator(name)
 	if !ok {
-		panic(fmt.Errorf("indicatorW %s not exists", name))
+		panic(fmt.Errorf("indicator %s not exists", name))
 	}
-	var input types.Input
-	if len(args) > 0 {
-		if in, ok := args[0].(types.Input); ok {
-			input = in
-		}
-	}
-	indicatorContext := NewIndicatorContext(input, c.kSeries)
-	return NewWindowIndicatorSeries(window, indicator, indicatorContext)
+	input := matchIndicatorArgs(args...)
+	indicatorContext := NewIndicatorContext(indicator, input, c.indicatorContextStates, c.kSeries, c.indicatorsReg)
+	return NewWindowIndicatorSeries(indicator, indicatorContext)
 }
 
 // IntervalStrategyContext 周期策略上下文
 type IntervalStrategyContext struct {
 	strategy.IIntervalSigStrategyContext
 
-	input               types.Input
-	intervalKlineSeries *types.IntervalState[*KlineSeries]
-	indicatorsReg       *indicator.IndicatorRegistry
+	input                          types.Input
+	intervalKlineSeries            *types.IntervalState[*KlineSeries]
+	indicatorsReg                  *indicator.IndicatorRegistry
+	intervalIndicatorContextStates map[types.Interval]IndicatorStates
 }
 
 func NewIntervalStrategyContext(input types.Input, intervalKlineSeries *types.IntervalState[*KlineSeries], indicatorsReg *indicator.IndicatorRegistry) *IntervalStrategyContext {
 	return &IntervalStrategyContext{
-		input:               input,
-		intervalKlineSeries: intervalKlineSeries,
-		indicatorsReg:       indicatorsReg,
+		input:                          input,
+		intervalKlineSeries:            intervalKlineSeries,
+		indicatorsReg:                  indicatorsReg,
+		intervalIndicatorContextStates: make(map[types.Interval]IndicatorStates),
 	}
 }
 
@@ -96,20 +95,20 @@ func (c *IntervalStrategyContext) Series(interval types.Interval, offset, count
 }
 
 // 获取窗口类型指标
-func (c *IntervalStrategyContext) IndicatorW(interval types.Interval, name string, window int16, args ...any) (series indicator.IIndicatorSeries) {
-	indicator, ok := c.indicatorsReg.IndicatorW(name)
+func (c *IntervalStrategyContext) Indicator(interval types.Interval, name string, args ...any) (series indicator.IIndicatorSeries) {
+	indicator, ok := c.indicatorsReg.Indicator(name)
 	if !ok {
-		panic(fmt.Errorf("indicatorW %s not exists", name))
+		panic(fmt.Errorf("indicator %s not exists", name))
 	}
 
-	var input types.Input
-	if len(args) > 0 {
-		if in, ok := args[0].(types.Input); ok {
-			input = in
-		}
+	input := matchIndicatorArgs(args...)
+	kSeries := c.getCandleSeries(interval)
+	// 状态传递
+	state, ok := c.intervalIndicatorContextStates[interval]
+	if !ok {
+		state = NewIndicatorStates()
+		c.intervalIndicatorContextStates[interval] = state
 	}
-	cs := c.getCandleSeries(interval)
-	indicatorContext := NewIndicatorContext(input, cs)
-
-	return NewWindowIndicatorSeries(window, indicator, indicatorContext)
+	indicatorContext := NewIndicatorContext(indicator, input, state, kSeries, c.indicatorsReg)
+	return NewWindowIndicatorSeries(indicator, indicatorContext)
 }
diff --git a/internal/trading/trading_grpc_server.go b/internal/trading/trading_grpc_server.go
index bba5f91..9b4fdeb 100644
--- a/internal/trading/trading_grpc_server.go
+++ b/internal/trading/trading_grpc_server.go
@@ -25,7 +25,7 @@ func (svr *TradingGrpcServer) Init() (err error) {
 func (svr *TradingGrpcServer) IndicatorSeries(ctx context.Context, req *pb.ReqIndicatorSeries) (rsp *pb.RspIndicatorSeries, err error) {
 	// s, err := structpb.NewStruct(map[string]any{})
 	input := req.Input.AsMap()
-	matrix, times, err := svr.tradingService.IndicatorSeries(ctx, req.Indicator, req.Window, types.Input(input), req.Series)
+	matrix, times, err := svr.tradingService.IndicatorSeries(ctx, req.Indicator, req.Digit, types.Input(input), req.Series)
 	if err != nil {
 		return
 	}
diff --git a/internal/trading/trading_service.go b/internal/trading/trading_service.go
index 9a6ba27..06bd314 100644
--- a/internal/trading/trading_service.go
+++ b/internal/trading/trading_service.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"math"
 	"sig-pub/api/pb"
 	"sig-pub/pkg/client"
 	"sig-pub/pkg/data"
@@ -198,8 +199,8 @@ func (svc *TradingService) fetchHistoryKlineSeries(ctx context.Context, sr *pb.S
 }
 
 // IndicatorSeries 获取指标实时或历史序列数据, 闭区间
-func (svc *TradingService) IndicatorSeries(ctx context.Context, indicatorName string, window uint32, input types.Input, sr *pb.SeriesRange) (matrix []float64, times []int64, err error) {
-	indicator, ok := svc.indicatorReg.IndicatorW(indicatorName)
+func (svc *TradingService) IndicatorSeries(ctx context.Context, indicatorName string, digit int32, input types.Input, sr *pb.SeriesRange) (matrix []float64, times []int64, err error) {
+	indicator, ok := svc.indicatorReg.Indicator(indicatorName)
 	if !ok {
 		err = fmt.Errorf("indicator %s not exists", indicatorName)
 		return
@@ -212,11 +213,16 @@ func (svc *TradingService) IndicatorSeries(ctx context.Context, indicatorName st
 	}
 
 	// 查询历史指标数据
-	requiredSeries := int(indicator.RequiredSeries(int16(window), input))
-	sr.WindowExtra = uint32(max(0, requiredSeries-1))
 	kSeries := sig.NewKlineSeries(sr.Exchange, sr.InstId, types.Interval(sr.Interval))
-	indicatorContext := sig.NewIndicatorContext(input, kSeries)
+	indicatorContext := sig.NewIndicatorContext(indicator, input, sig.NewIndicatorStates(), kSeries, svc.indicatorReg)
 
+	candlePeriods := int(indicator.CandlePeriods(indicatorContext))
+	sr.Desc = false
+	sr.WindowExtra = uint32(max(0, candlePeriods-1))
+
+	// 保留小数位数
+	digit = lang.Ternary(digit > 0 && digit <= 10, digit, 6)
+	pow := math.Pow(10, float64(digit))
 	matrix = make([]float64, 0, 200)
 	times = make([]int64, 0, 200)
 	err = svc.fetchHistoryKlineSeries(ctx, sr, func(k *types.Kline) (err error) {
@@ -224,11 +230,11 @@ func (svc *TradingService) IndicatorSeries(ctx context.Context, indicatorName st
 			err = fmt.Errorf("kline not series: %s(%s), interval=%s, lastTs=%d", sr.InstId, sr.Exchange, interval, lastTs)
 			return
 		}
-		if kSeries.Length() < requiredSeries {
+		if kSeries.Length() < candlePeriods {
 			return
 		}
-		vector := indicator.Calculate(indicatorContext, int16(window))
-		matrix = append(matrix, vector)
+		vector := indicator.Calculate(indicatorContext)
+		matrix = append(matrix, math.Round(vector*pow)/pow)
 		times = append(times, indicatorContext.Get(0).Ts)
 		return
 	})
diff --git a/pkg/indicator/atr.go b/pkg/indicator/atr.go
index ad10318..7297f16 100644
--- a/pkg/indicator/atr.go
+++ b/pkg/indicator/atr.go
@@ -11,16 +11,22 @@ type ATR struct {
 }
 
 // indicator interface
-func (c *ATR) Name() string {
-	return "atr"
+func (c *ATR) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "atr",
+		Input: []types.InputArg{
+			{Name: "window", Type: types.InputTypeUInt, Desc: "窗口大小"},
+		},
+	}
 }
 
-func (c *ATR) RequiredSeries(window int16, in types.Input) int16 {
-	return window + 1
+func (c *ATR) CandlePeriods(ctx IIndicatorContext) int16 {
+	return ctx.Input().Int16("window") + 1
 }
 
 // Calculate 计算单根k线rsi指标
-func (c *ATR) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
+func (c *ATR) Calculate(ctx IIndicatorContext) (vector float64) {
+	window := ctx.Input().Int16("window")
 	klineSeries := ctx.Series(0, int16(window)+1)
 	highs := klineSeries.High()
 	lows := klineSeries.Low()
diff --git a/pkg/indicator/ema.go b/pkg/indicator/ema.go
index 36d7a9d..d937c27 100644
--- a/pkg/indicator/ema.go
+++ b/pkg/indicator/ema.go
@@ -8,28 +8,33 @@ import (
 type EMA struct {
 }
 
-func (c *EMA) Name() string {
-	return "ema"
+func (c *EMA) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "ema",
+		Input: []types.InputArg{
+			{Name: "window", Type: types.InputTypeUInt, Desc: "窗口大小"},
+		},
+	}
 }
 
-func (c *EMA) RequiredSeries(window int16, in types.Input) int16 {
-	return window + 1
+func (c *EMA) CandlePeriods(ctx IIndicatorContext) int16 {
+	return ctx.Input().Int16("window") + 1
 }
 
 // Calculate 计算单根k线sma指标
-func (c *EMA) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
-	alpha := 2.0 / float64(window+1)
-
+func (c *EMA) Calculate(ctx IIndicatorContext) (vector float64) {
+	window := ctx.Input().Int16("window")
+	prevEma, ok := ctx.State().Get("ema", 1)
+	if !ok {
+		// 初始值用 sma 替代
+		prevEma = ctx.Series(1, window).Close().Avg()
+	}
+
+	multiplier := 2.0 / float64(window+1)
 	close := ctx.Get(0).CloseF64()
-	prevSMA := ctx.Series(1, window).Close().Avg()
-
-	vector = ((close - prevSMA) * alpha) + prevSMA
-
-	// ctx.GetSelf(0) // 自己计算的上一个值
+	vector = multiplier*close + (1-multiplier)*prevEma
+	// same: vector = ((close - prevEma) * multiplier) + prevEma
 
-	// 计算eam
-	// closeSeries := ctx.Series(0, window).Close().Reverse()
-	// ema := talib.Ema(closeSeries, int(window))
-	// vector = ema[len(ema)-1]
+	ctx.State().Set("ema", vector)
 	return
 }
diff --git a/pkg/indicator/indicator.go b/pkg/indicator/indicator.go
index 1711fb9..28f3e36 100644
--- a/pkg/indicator/indicator.go
+++ b/pkg/indicator/indicator.go
@@ -6,35 +6,49 @@ import (
 )
 
 const (
-	MaxWindow = 128
+	MaxWindow = 256
 )
 
-// IIndicator 指标基础计算接口
-type IIndicator interface {
-	Name() string
-	Calculate(kSeries IIndicatorContext) (vector float64)
+type IndicatorMeta struct {
+	Name  string           `json:"name"`  // 指标名称
+	Desc  string           `json:"desc"`  // 指标描述
+	Input []types.InputArg `json:"input"` // 输入参数
 }
 
-// IIndicator 窗口指标基础计算接口
-type IWindowIndicator interface {
-	// Name 指标名称
-	Name() string
-	// RequiredSeries 计算窗口大小的指标值需要的K线数量
-	RequiredSeries(window int16, in types.Input) int16
+// IIndicator 指标基础计算接口
+type IIndicator interface {
+	// Meta 指标元信息
+	Meta() IndicatorMeta
+	// CandlePeriods 计算窗口大小的指标值需要的K线数量
+	CandlePeriods(ctx IIndicatorContext) int16
 	// Calculate 计算窗口大小的指标值
-	Calculate(ctx IIndicatorContext, window int16) (vector float64)
+	Calculate(ctx IIndicatorContext) (vector float64)
 }
 
 // IIndicatorContext k线序列, trading服务提供
 type IIndicatorContext interface {
-	// Input 获取输入参数
-	Input() types.Input
 	Get(offset int16) (kline types.Kline)
 	Series(offset, count int16) (klines series.Klines)
+	// Input 获取输入参数
+	Input() types.Input
+	// State 存储指标运行中状态
+	State() IIndicatorState
+	// IndicatorW 获取其他指标
+	Indicator(name string, args ...any) (series IIndicatorSeries)
 }
 
 // IIndicatorSeries 指标序列, 供策略读取, trading服务提供
 type IIndicatorSeries interface {
+	CandlePeriods() int16
 	Get(offset int16) (vector float64)
 	Series(offset, count int16) (matrix series.Floats)
 }
+
+type IIndicatorState interface {
+	// Set 存储指标当前状态
+	Set(k string, v float64)
+	// Get 获取指标之前存储的状态 offset >= 1
+	Get(k string, offset int16) (v float64, ok bool)
+	// Series 获取指标之前存储的状态序列 offset >= 1, count >= 1
+	Series(k string, offset, count int16) (v series.Floats, ok bool)
+}
diff --git a/pkg/indicator/indicator_registry.go b/pkg/indicator/indicator_registry.go
index e55fbb8..22abe0e 100644
--- a/pkg/indicator/indicator_registry.go
+++ b/pkg/indicator/indicator_registry.go
@@ -7,12 +7,12 @@ import (
 
 // 指标注册器
 type IndicatorRegistry struct {
-	indicatorsW *collect.SyncMap[string, IWindowIndicator] // 注册窗口指标
+	indicators *collect.SyncMap[string, IIndicator] // 注册窗口指标
 }
 
 func NewIndicatorRegistry() *IndicatorRegistry {
 	return &IndicatorRegistry{
-		indicatorsW: collect.NewSyncMap[string, IWindowIndicator](),
+		indicators: collect.NewSyncMap[string, IIndicator](),
 	}
 }
 
@@ -23,13 +23,17 @@ func (r *IndicatorRegistry) Init() (err error) {
 	r.MustRegistIndicatorW(&ATR{})
 	r.MustRegistIndicatorW(&EMA{})
 	r.MustRegistIndicatorW(&MACD{})
+	r.MustRegistIndicatorW(&MacdDEA{})
+	r.MustRegistIndicatorW(&MacdHist{})
+	r.MustRegistIndicatorW(&OBV{})
+	r.MustRegistIndicatorW(&WOBV{})
 	return
 }
 
 // RegistIndicatorW
-func (r *IndicatorRegistry) RegistIndicatorW(ind IWindowIndicator) (err error) {
-	indName := ind.Name()
-	_, loaded := r.indicatorsW.LoadOrStore(indName, ind)
+func (r *IndicatorRegistry) RegistIndicatorW(ind IIndicator) (err error) {
+	indName := ind.Meta().Name
+	_, loaded := r.indicators.LoadOrStore(indName, ind)
 	if loaded {
 		err = fmt.Errorf("window indicator name %s already duplicated", indName)
 		return
@@ -37,13 +41,13 @@ func (r *IndicatorRegistry) RegistIndicatorW(ind IWindowIndicator) (err error) {
 	return
 }
 
-func (r *IndicatorRegistry) MustRegistIndicatorW(ind IWindowIndicator) {
+func (r *IndicatorRegistry) MustRegistIndicatorW(ind IIndicator) {
 	if err := r.RegistIndicatorW(ind); err != nil {
 		panic(err)
 	}
 }
 
-// IndicatorW
-func (r *IndicatorRegistry) IndicatorW(name string) (indW IWindowIndicator, ok bool) {
-	return r.indicatorsW.Load(name)
+// Indicator
+func (r *IndicatorRegistry) Indicator(name string) (indW IIndicator, ok bool) {
+	return r.indicators.Load(name)
 }
diff --git a/pkg/indicator/macd.go b/pkg/indicator/macd.go
index 40f117f..21f0a05 100644
--- a/pkg/indicator/macd.go
+++ b/pkg/indicator/macd.go
@@ -2,33 +2,111 @@ package indicator
 
 import (
 	"sig-pub/pkg/types"
-
-	"github.com/markcheno/go-talib"
 )
 
-// todo macdSignal(信号线) macdHist(柱状图)
+// MACD 拆分成: MACD线, MacdDEA(信号线), MacdHist(柱状图)
+// 计算 MACD 线 (DIF): 反映短期趋势与长期趋势的“收敛/散度”
+// MACD: https://www.investopedia.com/terms/m/macd.asp
 type MACD struct {
 }
 
-func (c *MACD) Name() string {
-	return "macd"
+// indicator interface
+func (c *MACD) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "macd",
+		Input: []types.InputArg{
+			{Name: "fast", Type: types.InputTypeUInt, Desc: "快线周期"},
+			{Name: "slow", Type: types.InputTypeUInt, Desc: "慢线周期"},
+		},
+	}
 }
 
-func (c *MACD) RequiredSeries(window int16, in types.Input) int16 {
-	return window
+func (c *MACD) CandlePeriods(ctx IIndicatorContext) int16 {
+	return max(
+		ctx.Indicator("ema", ctx.Input().Int16("fast")).CandlePeriods(),
+		ctx.Indicator("ema", ctx.Input().Int16("slow")).CandlePeriods(),
+	)
 }
 
 // Calculate 计算单根k线sma指标
-func (c *MACD) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
-	fast := ctx.Input().Int("fast")
-	slow := ctx.Input().Int("slow")
+func (c *MACD) Calculate(ctx IIndicatorContext) (vector float64) {
+	fast := ctx.Input().Int16("fast") // 12
+	slow := ctx.Input().Int16("slow") // 26
+
+	// macd计算从第max(fast, slow)期开始稳定
+	fastEma := ctx.Indicator("ema", fast).Get(0)
+	slowEma := ctx.Indicator("ema", slow).Get(0)
+	macd := fastEma - slowEma
+	vector = macd
+	return
+}
+
+// MacdDEA macd信号线计算
+type MacdDEA struct {
+}
+
+func (c *MacdDEA) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "macd_dea",
+		Input: []types.InputArg{
+			{Name: "fast", Type: types.InputTypeUInt, Desc: "快线周期"},
+			{Name: "slow", Type: types.InputTypeUInt, Desc: "慢线周期"},
+			{Name: "singal", Type: types.InputTypeUInt, Desc: "信号线周期"},
+		},
+	}
+}
+
+func (c *MacdDEA) CandlePeriods(ctx IIndicatorContext) int16 {
+	return max(
+		ctx.Input().Int16("singal")+1,
+		ctx.Indicator("macd", ctx.Input()).CandlePeriods(),
+	)
+}
 
-	// 计算eam
-	closeSeries := ctx.Series(0, window).Close().Reverse()
+func (c *MacdDEA) Calculate(ctx IIndicatorContext) (vector float64) {
+	singal := ctx.Input().Int16("singal") // 9
 
-	aa, bb, cc := talib.Macd(closeSeries, fast, slow, int(window))
-	_, _, _ = aa, bb, cc
+	deaPrev, ok := ctx.State().Get("macd_dea", 1)
+	if !ok {
+		// 初始值前9期的 MACD SMA
+		macdPrevs := ctx.Indicator("macd", ctx.Input()).Series(1, singal)
+		deaPrev = macdPrevs.Avg()
+	}
+	macd := ctx.Indicator("macd", ctx.Input()).Get(0)
+	// 计算DEA
+	beta := 2 / float64(singal+1)
+	dea := beta*macd + (1-beta)*deaPrev
+	ctx.State().Set("macd_dea", dea)
+
+	vector = dea
+	return
+}
+
+// MacdSingal macd柱状图计算
+type MacdHist struct {
+}
+
+func (c *MacdHist) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "macd_hist",
+		Input: []types.InputArg{
+			{Name: "fast", Type: types.InputTypeUInt, Desc: "快线周期"},
+			{Name: "slow", Type: types.InputTypeUInt, Desc: "慢线周期"},
+			{Name: "singal", Type: types.InputTypeUInt, Desc: "信号线周期"},
+		},
+	}
+}
+
+func (c *MacdHist) CandlePeriods(ctx IIndicatorContext) int16 {
+	return max(
+		ctx.Indicator("macd", ctx.Input()).CandlePeriods(),
+		ctx.Indicator("macd_dea", ctx.Input()).CandlePeriods(),
+	)
+}
 
-	vector = 0
+func (c *MacdHist) Calculate(ctx IIndicatorContext) (vector float64) {
+	macd := ctx.Indicator("macd", ctx.Input()).Get(0)
+	macd_dea := ctx.Indicator("macd_dea", ctx.Input()).Get(0)
+	vector = macd - macd_dea
 	return
 }
diff --git a/pkg/indicator/obv.go b/pkg/indicator/obv.go
new file mode 100644
index 0000000..d9c5ff7
--- /dev/null
+++ b/pkg/indicator/obv.go
@@ -0,0 +1,41 @@
+package indicator
+
+import "sig-pub/pkg/types"
+
+// OBV 成交量平衡指标
+// 1. 初始状态：OBV_0 = 0。
+// 2. 若 Close_t > Close_{t-1}：OBV_t = OBV_{t-1} + Volume_t。
+// 3. 若 Close_t < Close_{t-1}：OBV_t = OBV_{t-1} - Volume_t。
+// 4. 平盘：OBV_t = OBV_{t-1}。
+// 状态：前一 OBV 值。用于判断资金流入/流出
+type OBV struct {
+}
+
+func (c *OBV) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name:  "obv",
+		Input: []types.InputArg{}, // todo 无参指标tsdb存储
+	}
+}
+
+func (c *OBV) CandlePeriods(ctx IIndicatorContext) int16 {
+	return 2
+}
+
+func (c *OBV) Calculate(ctx IIndicatorContext) (vector float64) {
+	obvPrev, ok := ctx.State().Get("obv", 1)
+	if !ok {
+		obvPrev = 0
+	}
+	k := ctx.Get(0)
+	cmp := k.Close.Cmp(ctx.Get(1).Close)
+	if cmp > 0 {
+		vector = obvPrev + k.VolF64()
+	} else if cmp < 0 {
+		vector = obvPrev - k.VolF64()
+	} else {
+		vector = obvPrev
+	}
+	ctx.State().Set("obv", vector)
+	return
+}
diff --git a/pkg/indicator/rsi.go b/pkg/indicator/rsi.go
index 086892c..5c33c7c 100644
--- a/pkg/indicator/rsi.go
+++ b/pkg/indicator/rsi.go
@@ -11,16 +11,23 @@ import (
 type RSI struct {
 }
 
-func (c *RSI) Name() string {
-	return "rsi"
+// indicator interface
+func (c *RSI) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "rsi",
+		Input: []types.InputArg{
+			{Name: "window", Type: types.InputTypeUInt, Desc: "窗口大小"},
+		},
+	}
 }
 
-func (c *RSI) RequiredSeries(window int16, in types.Input) int16 {
-	return window
+func (c *RSI) CandlePeriods(ctx IIndicatorContext) int16 {
+	return ctx.Input().Int16("window")
 }
 
 // Calculate 计算单根k线rsi指标
-func (c *RSI) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
+func (c *RSI) Calculate(ctx IIndicatorContext) (vector float64) {
+	window := ctx.Input().Int16("window")
 	// 读k线, 计算
 	klineSeries := ctx.Series(0, int16(window))
 	closeSeries := klineSeries.Close()
diff --git a/pkg/indicator/sam.go b/pkg/indicator/sam.go
index 510d95f..083c139 100644
--- a/pkg/indicator/sam.go
+++ b/pkg/indicator/sam.go
@@ -12,16 +12,22 @@ type SMA struct {
 }
 
 // indicator interface
-func (c *SMA) Name() string {
-	return "sma"
+func (c *SMA) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name: "sma",
+		Input: []types.InputArg{
+			{Name: "window", Type: types.InputTypeUInt, Desc: "窗口大小"},
+		},
+	}
 }
 
-func (c *SMA) RequiredSeries(window int16, in types.Input) int16 {
-	return window
+func (c *SMA) CandlePeriods(ctx IIndicatorContext) int16 {
+	return ctx.Input().Int16("window")
 }
 
 // Calculate 计算单根k线sma指标
-func (c *SMA) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
+func (c *SMA) Calculate(ctx IIndicatorContext) (vector float64) {
+	window := ctx.Input().Int16("window")
 	closeSeries := ctx.Series(0, window).Close()
 	sma := talib.Sma(closeSeries, int(window))
 	_ = sma[len(sma)-1]
diff --git a/pkg/indicator/wobv.go b/pkg/indicator/wobv.go
new file mode 100644
index 0000000..91652c4
--- /dev/null
+++ b/pkg/indicator/wobv.go
@@ -0,0 +1,37 @@
+package indicator
+
+import "sig-pub/pkg/types"
+
+// WOBV 波动加权 OBV
+// 1. 状态：WOBV_{t-1}。
+// 2. 更新：WOBV_t = WOBV_{t-1} + [ (Close - Open) / (High - Low) × Volume_t ]。
+// https://www.95sca.cn/archives/76688
+// WOBV小策略: https://zhuanlan.zhihu.com/p/422341694
+type WOBV struct {
+}
+
+func (c *WOBV) Meta() IndicatorMeta {
+	return IndicatorMeta{
+		Name:  "wobv",
+		Input: []types.InputArg{}, // todo 无参指标tsdb存储
+	}
+}
+
+func (c *WOBV) CandlePeriods(ctx IIndicatorContext) int16 {
+	return 2
+}
+
+func (c *WOBV) Calculate(ctx IIndicatorContext) (vector float64) {
+	wobvPrev, ok := ctx.State().Get("wobv", 1)
+	if !ok {
+		wobvPrev = 0
+	}
+
+	k := ctx.Get(0)
+	wf := (k.CloseF64() - k.OpenF64()) / (k.HighF64() - k.LowF64())
+	wobv := wobvPrev + wf*k.VolF64()
+	ctx.State().Set("wobv", wobv)
+
+	vector = wobv
+	return
+}
diff --git a/pkg/strategy/cross_star.go b/pkg/strategy/cross_star.go
index 0d1bc17..b7baf9f 100644
--- a/pkg/strategy/cross_star.go
+++ b/pkg/strategy/cross_star.go
@@ -21,9 +21,9 @@ func (s *CrossStar) Meta() StrategyMeta {
 	return StrategyMeta{
 		Name: "CrossStar",
 		Desc: "十字星策略",
-		Args: []Param{
-			{Name: "rate", Type: ParamTypeUFloat, Desc: "上线影线与基线比例"},
-			{Name: "rate2", Type: ParamTypeUFloat, Desc: "上线影线之间比例"},
+		Input: []types.InputArg{
+			{Name: "rate", Type: types.InputTypeUFloat, Desc: "上线影线与基线比例"},
+			{Name: "rate2", Type: types.InputTypeUFloat, Desc: "上线影线之间比例"},
 		},
 	}
 }
diff --git a/pkg/strategy/gold_x.go b/pkg/strategy/gold_x.go
index cd76263..2680151 100644
--- a/pkg/strategy/gold_x.go
+++ b/pkg/strategy/gold_x.go
@@ -19,9 +19,9 @@ func (s *GoldX) Meta() StrategyMeta {
 	return StrategyMeta{
 		Name: "GoldX",
 		Desc: "金叉策略",
-		Args: []Param{
-			{Name: "short", Type: ParamTypeUInt, Desc: "短周期"},
-			{Name: "long", Type: ParamTypeUInt, Desc: "长周期"},
+		Input: []types.InputArg{
+			{Name: "short", Type: types.InputTypeUInt, Desc: "短周期"},
+			{Name: "long", Type: types.InputTypeUInt, Desc: "长周期"},
 		},
 	}
 }
@@ -41,8 +41,8 @@ func (s *GoldX) RequiredSeries(input types.Input) int16 {
 }
 
 func (s *GoldX) Update(ctx ISingleSigStrategyContext) (side types.Side) {
-	sma14 := ctx.IndicatorW("sma", s.short)
-	sma28 := ctx.IndicatorW("sma", s.long)
+	sma14 := ctx.Indicator("sma", s.short)
+	sma28 := ctx.Indicator("sma", s.long)
 	// 包装方法 crossover/crossunder
 	s14 := sma14.Series(0, 2)
 	s28 := sma28.Series(0, 2)
diff --git a/pkg/strategy/sig_strategy.go b/pkg/strategy/sig_strategy.go
index 6b8495e..19c2806 100644
--- a/pkg/strategy/sig_strategy.go
+++ b/pkg/strategy/sig_strategy.go
@@ -14,9 +14,9 @@ type ISigStrategy interface {
 }
 
 type StrategyMeta struct {
-	Name string  `json:"name"`
-	Desc string  `json:"desc"`
-	Args []Param `json:"args"` // 参数定义
+	Name  string           `json:"name"`
+	Desc  string           `json:"desc"`
+	Input []types.InputArg `json:"input"` // 参数定义
 }
 
 // ISingleSigStrategy 单周期单交易所策略
@@ -34,8 +34,8 @@ type ISingleSigStrategyContext interface {
 	Get(offset int16) types.Kline
 	// Series [offset...end]
 	Series(offset, count int16) (klines series.Klines)
-	// IndicatorW 获取窗口类型指标
-	IndicatorW(name string, window int16, args ...any) indicator.IIndicatorSeries
+	// Indicator 获取窗口类型指标
+	Indicator(name string, args ...any) indicator.IIndicatorSeries
 }
 
 // 多周期k线策略接口
@@ -54,5 +54,5 @@ type IIntervalSigStrategyContext interface {
 	// Series [offset...end]
 	Series(interval types.Interval, offset, count int16) (klines series.Klines)
 	// 获取窗口类型指标
-	IndicatorW(interval types.Interval, name string, window int16, args ...any) indicator.IIndicatorSeries
+	Indicator(interval types.Interval, name string, args ...any) indicator.IIndicatorSeries
 }
diff --git a/pkg/strategy/sig_strategy_params.go b/pkg/strategy/sig_strategy_input_adjust.go
similarity index 61%
rename from pkg/strategy/sig_strategy_params.go
rename to pkg/strategy/sig_strategy_input_adjust.go
index ca35abc..5806fc7 100644
--- a/pkg/strategy/sig_strategy_params.go
+++ b/pkg/strategy/sig_strategy_input_adjust.go
@@ -6,66 +6,6 @@ import (
 	"github.com/spf13/cast"
 )
 
-// 参数类型
-type ParamType int8
-
-const (
-	_ ParamType = iota
-	ParamTypeBool
-	ParamTypeFloat
-	ParamTypeUFloat
-	ParamTypeInt
-	ParamTypeUInt
-	ParamTypeString
-	ParamTypeSelect   // 单选
-	ParamTypeCheckBox // 多选
-)
-
-type Param struct {
-	Name    string        `json:"name"`
-	Desc    string        `json:"desc"`
-	Type    ParamType     `json:"type"`    // 参数类型
-	Options []ParamOption `json:"options"` // 单选/多选选项列表
-}
-
-type ParamOption struct {
-	Name string `json:"name"`
-	Desc string `json:"desc"`
-}
-
-// CastValidate 数据类型校验
-func (t Param) TypeValidate(v string) bool {
-	switch t.Type {
-	default:
-		return false
-	case ParamTypeBool:
-		if _, e := cast.ToBoolE(v); e != nil {
-			return false
-		}
-		return true
-	case ParamTypeString:
-		return true
-	case ParamTypeInt:
-		fallthrough
-	case ParamTypeUInt:
-		if r, e := cast.ToIntE(v); e != nil {
-			return false
-		} else if t.Type == ParamTypeUInt {
-			return r >= 0
-		}
-		return true
-	case ParamTypeFloat:
-		fallthrough
-	case ParamTypeUFloat:
-		if r, e := cast.ToFloat64E(v); e != nil {
-			return false
-		} else if t.Type == ParamTypeUFloat {
-			return r >= 0
-		}
-		return true
-	}
-}
-
 // 策略默认参数
 type ISigStrategyDefaultParam interface {
 	DefaultParam() map[string]string
diff --git a/pkg/strategy/super_trend.go b/pkg/strategy/super_trend.go
index d8aa83d..fe22428 100644
--- a/pkg/strategy/super_trend.go
+++ b/pkg/strategy/super_trend.go
@@ -28,10 +28,10 @@ func (s *SupertrendBOSWaves) Meta() StrategyMeta {
 	return StrategyMeta{
 		Name: "SupertrendBOSWaves",
 		Desc: "曲线半径超级趋势 [BOSWaves] https://www.tradingview.com/script/v0Fr7PAb-Curved-Radius-Supertrend-BOSWaves/",
-		Args: []Param{
-			{Name: "atrLength", Type: ParamTypeUInt, Desc: "atr指标长度,14"},
-			{Name: "atrMult", Type: ParamTypeUFloat, Desc: "atr倍数,2"},
-			{Name: "radiusStrength", Type: ParamTypeUFloat, Desc: `
+		Input: []types.InputArg{
+			{Name: "atrLength", Type: types.InputTypeUInt, Desc: "atr指标长度,14"},
+			{Name: "atrMult", Type: types.InputTypeUFloat, Desc: "atr倍数,2"},
+			{Name: "radiusStrength", Type: types.InputTypeUFloat, Desc: `
 				Controls curve acceleration strength.\n\n" +
 					"Recommended values by timeframe:\n" +
 					"• 1-5min (Scalping): 0.08-0.12\n" +
@@ -43,7 +43,7 @@ func (s *SupertrendBOSWaves) Meta() StrategyMeta {
 					"Lower = Tighter curves (responsive)\n" +
 					"Higher = Wider curves (smoother)
 			`},
-			{Name: "smoothness", Type: ParamTypeUInt, Desc: "Smoothing applied to curved band. Higher = smoother curves, less noise."},
+			{Name: "smoothness", Type: types.InputTypeUInt, Desc: "Smoothing applied to curved band. Higher = smoother curves, less noise."},
 		},
 	}
 }
@@ -64,7 +64,7 @@ func (s *SupertrendBOSWaves) Update(ctx ISingleSigStrategyContext) (side types.S
 	k0 := ctx.Get(0)
 	high, low, close := k0.HighF64(), k0.LowF64(), k0.CloseF64()
 
-	atr := ctx.IndicatorW("atr", s.atrLength).Get(0)
+	atr := ctx.Indicator("atr", s.atrLength).Get(0)
 	src := (high + low) / 2
 	// src := k0.HL2()
 
diff --git a/pkg/types/input.go b/pkg/types/input.go
index 8ef3215..91c8296 100644
--- a/pkg/types/input.go
+++ b/pkg/types/input.go
@@ -50,7 +50,9 @@ func (in Input) get(k string, t string) (r any) {
 
 func (in Input) Float(k string) (v float64) {
 	if r, ok := in.getCache(k); ok {
-		return r.(float64)
+		if v, ok = r.(float64); ok {
+			return
+		}
 	}
 	v, err := cast.ToFloat64E(in.get(k, "float"))
 	if err != nil {
@@ -62,7 +64,9 @@ func (in Input) Float(k string) (v float64) {
 
 func (in Input) Int(k string) (v int) {
 	if r, ok := in.getCache(k); ok {
-		return r.(int)
+		if v, ok = r.(int); ok {
+			return
+		}
 	}
 	v, err := cast.ToIntE(in.get(k, "int"))
 	if err != nil {
@@ -74,7 +78,9 @@ func (in Input) Int(k string) (v int) {
 
 func (in Input) Int16(k string) (v int16) {
 	if r, ok := in.getCache(k); ok {
-		return r.(int16)
+		if v, ok = r.(int16); ok {
+			return
+		}
 	}
 	v, err := cast.ToInt16E(in.get(k, "int16"))
 	if err != nil {
@@ -83,3 +89,44 @@ func (in Input) Int16(k string) (v int16) {
 	in.setCache(k, v)
 	return
 }
+
+func (in Input) String(k string) (v string) {
+	if r, ok := in.getCache(k); ok {
+		if v, ok = r.(string); ok {
+			return
+		}
+	}
+	v, err := cast.ToStringE(in.get(k, "string"))
+	if err != nil {
+		panic(fmt.Errorf("input string parse error: %s", k))
+	}
+	in.setCache(k, v)
+	return
+}
+
+// 参数类型
+type InputType int8
+
+const (
+	_ InputType = iota
+	InputTypeBool
+	InputTypeFloat
+	InputTypeUFloat
+	InputTypeInt
+	InputTypeUInt
+	InputTypeString
+	InputTypeSelect   // 单选
+	InputTypeCheckBox // 多选
+)
+
+type InputArg struct {
+	Name    string        `json:"name"`
+	Desc    string        `json:"desc"`
+	Type    InputType     `json:"type"`    // 参数类型
+	Options []InputOption `json:"options"` // 单选/多选选项列表
+}
+
+type InputOption struct {
+	Name string `json:"name"`
+	Desc string `json:"desc"`
+}
diff --git a/pkg/types/ring_series.go b/pkg/types/ring_series.go
new file mode 100644
index 0000000..f61d37d
--- /dev/null
+++ b/pkg/types/ring_series.go
@@ -0,0 +1,69 @@
+package types
+
+import "fmt"
+
+// RingSeries 环形数组, 后入先出
+type RingSeries[T any] struct {
+	values   []T
+	capacity int  // 总长度
+	length   int  // 当前长度
+	head     int  // 下一个读取位置
+	tail     int  // 下一个丢弃位置
+	full     bool // 环形数组是否已满
+}
+
+func NewRingSeries[T any](capacity, init int) *RingSeries[T] {
+	if capacity <= 0 {
+		panic(fmt.Errorf("ring series capacity must > 0"))
+	}
+	return &RingSeries[T]{
+		capacity: capacity,
+		values:   make([]T, 0, init),
+		head:     -1,
+	}
+}
+
+func (r *RingSeries[T]) Length() int {
+	return r.length
+}
+
+func (r *RingSeries[T]) Push(v T) (ok bool) {
+	if !r.full {
+		r.values = append(r.values, v)
+		r.head++
+		r.length++
+		r.full = r.length == r.capacity
+		return
+	}
+	r.values[r.tail] = v
+	r.head = r.tail
+	r.tail = (r.tail + 1) % r.capacity
+	return
+}
+
+// Get 0当前, 1前一个
+func (r *RingSeries[T]) Get(offset int) (v T, ok bool) {
+	if offset < 0 || offset >= r.length || r.length == 0 {
+		return
+	}
+	i := r.head - offset
+	if i < 0 {
+		i = i + r.capacity
+	}
+	return r.values[i], true
+}
+
+func (r *RingSeries[T]) Series(offset, count int) (v []T, ok bool) {
+	if offset < 0 || offset >= r.length || count <= 0 || count > r.length {
+		return
+	}
+	v = make([]T, count)
+	for i := range count {
+		v[i], ok = r.Get(offset)
+		if !ok {
+			return
+		}
+		offset++
+	}
+	return
+}
diff --git a/pkg/types/ring_series_test.go b/pkg/types/ring_series_test.go
new file mode 100644
index 0000000..4c328b7
--- /dev/null
+++ b/pkg/types/ring_series_test.go
@@ -0,0 +1,30 @@
+package types
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestRingSeries(t *testing.T) {
+	rs1 := NewRingSeries[int](1, 1)
+	rs1.Push(1)
+	r1, ok := rs1.Get(0)
+	if !ok {
+		t.Error(ok)
+		return
+	}
+	if r1 != 1 {
+		t.Error(r1)
+		return
+	}
+
+	rs2 := NewRingSeries[int](10, 3)
+	for i := range 11 {
+		rs2.Push(i)
+	}
+	for i := range 10 {
+		fmt.Println(rs2.Get(i))
+	}
+	fmt.Println("--------------------")
+	fmt.Println(rs2.Series(0, 1))
+}