diff --git a/internal/trading/kline_series.go b/internal/trading/kline_series.go
index 035553c..881595e 100644
--- a/internal/trading/kline_series.go
+++ b/internal/trading/kline_series.go
@@ -1,39 +1,53 @@
 package trading
 
 import (
+	"fmt"
 	"sig-pub/api/pb"
 	"sig-pub/pkg/types"
 	"sig-pub/pkg/types/series"
+	"sig-pub/pkg/zlog"
+	"sync"
+)
+
+const (
+	MaxSeriesKlines = 1000
 )
 
 type KlineSeries struct {
-	Exchange   pb.ExchangeType
-	InstId     string
-	Interval   types.Interval
-	Ts         int64
-	klines     []*types.Kline
-	klineStore *KlineStore
+	sync.RWMutex
+	Exchange      pb.ExchangeType
+	InstId        string
+	Interval      types.Interval
+	IntervalAdder types.IntervalAdder
+	lastTs        int64
+	klines        []*types.Kline
 }
 
-func NewKlineSeries(ts int64, interval types.Interval, klineStore *KlineStore) *KlineSeries {
+func NewKlineSeries(exchange pb.ExchangeType, instId string, interval types.Interval) *KlineSeries {
+	intervalAdder, ok := types.SupportedIntervals[interval]
+	if !ok {
+		panic(fmt.Errorf("unsupport interval: %s", interval))
+	}
 	return &KlineSeries{
-		Ts:         ts,
-		Interval:   interval,
-		klineStore: klineStore,
+		Exchange:      exchange,
+		InstId:        instId,
+		Interval:      interval,
+		IntervalAdder: intervalAdder,
+		klines:        make([]*types.Kline, 0, MaxSeriesKlines/10),
 	}
 }
 
 // Get
 // [0]当前k线
-func (a KlineSeries) Get(start int16) types.Kline {
-	index := len(a.klines) - 1 - int(start)
-	if index >= 0 && index < len(a.klines)-1 {
-		return *(a.klines[index])
+func (s *KlineSeries) Get(start int16) types.Kline {
+	index := len(s.klines) - 1 - int(start)
+	if index >= 0 && index < len(s.klines)-1 {
+		return *(s.klines[index])
 	}
 
 	// todo query store
-	ts := a.Interval.MustAddMul(a.Ts, int64(-start))
-	for _, k := range a.klines {
+	ts := s.Interval.MustAddMul(s.lastTs, int64(-start))
+	for _, k := range s.klines {
 		if k.Ts == ts {
 			return *k
 		}
@@ -43,9 +57,9 @@ func (a KlineSeries) Get(start int16) types.Kline {
 }
 
 // Series [start...end]
-func (a KlineSeries) Series(start, end int16) (klines series.Klines) {
-	endTs := a.Interval.MustAddMul(a.Ts, int64(-start))
-	startTs := a.Interval.MustAddMul(a.Ts, int64(-end))
+func (s *KlineSeries) Series(start, end int16) (klines series.Klines) {
+	endTs := s.Interval.MustAddMul(s.lastTs, int64(-start))
+	startTs := s.Interval.MustAddMul(s.lastTs, int64(-end))
 	_ = endTs
 	_ = startTs
 	// return a.klineStore.GetRange(startTs, endTs)
@@ -54,9 +68,38 @@ func (a KlineSeries) Series(start, end int16) (klines series.Klines) {
 }
 
 // 检查k线序列完整
-func (s *KlineSeries) Update(kline *types.Kline) []types.Kline {
-	s.klines = append(s.klines, kline)
-	// todo copy(s.klines, s.klines[0:1]) set index=20, ts=kline.ts
-	s.Ts = kline.Ts
-	return nil
+func (s *KlineSeries) Update(kline *types.Kline) (lastTs int64, serial bool) {
+	s.Lock()
+	defer s.Unlock()
+
+	serial = true
+	lastTs = s.lastTs
+	if kline.Ts <= s.lastTs {
+		// 已存在的k线，直接忽略
+		return
+	}
+	// 检查k线是否连续
+	if len(s.klines) > 0 {
+		expectTs := s.Interval.MustAddMul(s.lastTs, 1)
+		if kline.Ts != expectTs {
+
+			serial = false
+			zlog.Warningf("k线不连续: last.Ts=%d, expected=%d, got=%d", s.lastTs, expectTs, kline.Ts)
+			return
+		}
+	}
+
+	if cap(s.klines) < MaxSeriesKlines {
+		s.klines = append(s.klines, kline)
+	} else {
+		if len(s.klines) < MaxSeriesKlines {
+			s.klines = append(s.klines, kline)
+		} else {
+			// 循环复用切片空间，避免扩容
+			copy(s.klines, s.klines[1:])
+			s.klines[MaxSeriesKlines-1] = kline
+		}
+	}
+	s.lastTs = kline.Ts
+	return
 }
diff --git a/internal/trading/kline_store.go b/internal/trading/kline_store.go
index beff5b4..4df07c5 100644
--- a/internal/trading/kline_store.go
+++ b/internal/trading/kline_store.go
@@ -9,24 +9,60 @@ import (
 
 type KlineStore struct {
 	vmdb  vmts.VictoriaMetricsTSDB
-	store [3]*collect.ConcurrentMap[string, *collect.ConcurrentMap[types.Interval, *KlineSeries]] // K线列表: []exchange<instId, interval, klines>
+	store [3]*collect.ConcurrentMap[string, *KlineStoreInstance] // K线列表: []exchange<instId, interval, klines>
 }
 
 func NewKlineSeriesStore() (kss *KlineStore) {
 	kss = &KlineStore{}
-	kss.store[pb.ExchangeType_OKX] = collect.NewConcurrentMap[string, *collect.ConcurrentMap[types.Interval, *KlineSeries]](64, func(s string) string { return s })
+	kss.store[pb.ExchangeType_OKX] = collect.NewConcurrentMap[string, *KlineStoreInstance](64, func(s string) string { return s })
 	// kss.klines[pb.ExchangeType_BINANCE] =
 	return
 }
 
 func (s *KlineStore) Update(exchange pb.ExchangeType, instId string, kline *types.Kline) (k types.Kline) {
-	// klineSeries Update
-	intervals := s.store[exchange].ComputeIfAbsent(instId, func(k string) *collect.ConcurrentMap[types.Interval, *KlineSeries] {
-		return collect.NewConcurrentMap[types.Interval, *KlineSeries](8, func(t types.Interval) string { return string(t) })
+	storeInst := s.store[exchange].ComputeIfAbsent(instId, func(k string) *KlineStoreInstance {
+		return NewKlineStoreInstance(exchange, k)
 	})
-	klineSeries := intervals.ComputeIfAbsent(kline.Interval, func(interval types.Interval) *KlineSeries {
-		return NewKlineSeries(0, interval, s)
-	})
-	klineSeries.Update(kline)
+	storeInst.Update(kline)
+	return
+}
+
+// KlineStoreInstance 单个交易产品所有周期k线
+type KlineStoreInstance struct {
+	Exchange       pb.ExchangeType
+	InstId         string
+	IntervalKlines *collect.SyncMap[types.Interval, *KlineSeries]
+}
+
+func NewKlineStoreInstance(exchange pb.ExchangeType, instId string) *KlineStoreInstance {
+	si := &KlineStoreInstance{
+		Exchange:       exchange,
+		InstId:         instId,
+		IntervalKlines: collect.NewSyncMap[types.Interval, *KlineSeries](),
+	}
+	for interval := range types.SupportedIntervals {
+		si.IntervalKlines.Store(interval, NewKlineSeries(exchange, instId, interval))
+	}
+	return si
+}
+
+// Update 更新k线
+// kline klineStore -> klineSeries -> strategy -> indicator -> klineSeries.Series
+func (si *KlineStoreInstance) Update(kline *types.Kline) (ok bool) {
+	ks, ok := si.IntervalKlines.Load(kline.Interval)
+	if !ok {
+		return
+	}
+
+	if lastTs, serial := ks.Update(kline); !serial {
+		// k线不完整
+		// 拉取k线
+		start := lastTs
+		end := kline.Ts
+		_, _ = start, end
+	}
+
+	ok = true
+	// emit kline event
 	return
 }
diff --git a/internal/trading/trading_service.go b/internal/trading/trading_service.go
index d0689bd..efb5d4c 100644
--- a/internal/trading/trading_service.go
+++ b/internal/trading/trading_service.go
@@ -111,6 +111,7 @@ func (svr *TradingService) subscribeKlines(reconnect bool) {
 			kline := new(types.Kline)
 			kline.ParsePBKline(msg.Kline.Exchange, k)
 			zlog.Debugf("recv: streamId=%d, %v, %s, %#v", msg.Kline.StreamId, msg.Kline.Exchange, msg.Kline.InstId, kline)
+			// kline klineStore -> klineSeries -> strategy -> indicator -> klineSeries.Series
 			svr.klineStore.Update(msg.Kline.Exchange, msg.Kline.InstId, kline)
 		}
 	}