package indicator

import (
	"github.com/markcheno/go-talib"
)

// RSI stateless indicator
// 相对强弱指数 (RSI) rsi define: https://www.investopedia.com/terms/r/rsi.asp
type SMA struct {
}

// indicator interface
func (c *SMA) Name() string {
	return "sma"
}

// Calculate 计算单根k线sma指标
func (c *SMA) Calculate(ctx IIndicatorContext, window int16) (vector float64) {
	closeSeries := ctx.Series(0, window).Close()
	sma := talib.Sma(closeSeries, int(window))
	_ = sma[len(sma)-1]
	vector = closeSeries.Avg()
	return
}