67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
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package indicator
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import (
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"time"
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"git.qtrade.icu/lychiyu/bbgo/pkg/datatype/floats"
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"git.qtrade.icu/lychiyu/bbgo/pkg/types"
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)
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/*
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ad implements accumulation/distribution indicator
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Accumulation/Distribution Indicator (A/D)
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- https://www.investopedia.com/terms/a/accumulationdistribution.asp
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*/
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//go:generate callbackgen -type AD
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type AD struct {
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types.SeriesBase
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types.IntervalWindow
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Values floats.Slice
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PrePrice float64
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EndTime time.Time
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UpdateCallbacks []func(value float64)
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}
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func (inc *AD) Update(high, low, cloze, volume float64) {
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if len(inc.Values) == 0 {
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inc.SeriesBase.Series = inc
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}
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var moneyFlowVolume float64
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if high == low {
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moneyFlowVolume = 0
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} else {
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moneyFlowVolume = ((2*cloze - high - low) / (high - low)) * volume
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}
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ad := inc.Last(0) + moneyFlowVolume
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inc.Values.Push(ad)
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}
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func (inc *AD) Last(i int) float64 {
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return inc.Values.Last(i)
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}
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func (inc *AD) Index(i int) float64 {
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return inc.Last(i)
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}
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func (inc *AD) Length() int {
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return len(inc.Values)
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}
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var _ types.SeriesExtend = &AD{}
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func (inc *AD) CalculateAndUpdate(kLines []types.KLine) {
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for _, k := range kLines {
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if inc.EndTime != zeroTime && !k.EndTime.After(inc.EndTime) {
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continue
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}
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inc.Update(k.High.Float64(), k.Low.Float64(), k.Close.Float64(), k.Volume.Float64())
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}
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inc.EmitUpdate(inc.Last(0))
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inc.EndTime = kLines[len(kLines)-1].EndTime.Time()
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}
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