在Pine脚本中，如何通过引用上一个栏来消除多个警报

Question

在TradingView Pine脚本中，如何通过引用先前的栏来消除多个背对背警报？例如，下面的警报可能会连续多次触发。我希望它仅在上一个栏尚未达到触发因素的情况下才能触发。这样，它就不会背对背。

indicator(title="DIs Indicator v1", shorttitle="DIs Indicator v1", format=format.price, precision=4, timeframe="", timeframe_gaps=true)


// Get User Inputs
len                 = input.int(defval=5, minval=1, title="ADX and DI Length", group="ADX and DI")
adxThreshhold       = input.int(title="ADX Threshhold",defval=20, group="ADX and DI")
diAbove         = input.int(title="DIAbove",defval=20, group="ADX and DI")  
diBelow         = input.int(title="DIBelow",defval=20, group="ADX and DI")


// ADX Value
TrueRange = math.max(math.max(high-low, math.abs(high-nz(close[1]))), math.abs(low-nz(close[1])))
DirectionalMovementPlus = high-nz(high[1]) > nz(low[1])-low ? math.max(high-nz(high[1]), 0): 0
DirectionalMovementMinus = nz(low[1])-low > high-nz(high[1]) ? math.max(nz(low[1])-low, 0): 0

SmoothedTrueRange = 0.0
SmoothedTrueRange := nz(SmoothedTrueRange[1]) - (nz(SmoothedTrueRange[1])/len) + TrueRange
SmoothedDirectionalMovementPlus = 0.0
SmoothedDirectionalMovementPlus := nz(SmoothedDirectionalMovementPlus[1]) - (nz(SmoothedDirectionalMovementPlus[1])/len) + DirectionalMovementPlus
SmoothedDirectionalMovementMinus = 0.0
SmoothedDirectionalMovementMinus := nz(SmoothedDirectionalMovementMinus[1]) - (nz(SmoothedDirectionalMovementMinus[1])/len) + DirectionalMovementMinus

DIPlus = SmoothedDirectionalMovementPlus / SmoothedTrueRange * 100
DIMinus = SmoothedDirectionalMovementMinus / SmoothedTrueRange * 100
DX = math.abs(DIPlus-DIMinus) / (DIPlus+DIMinus)*100
ADX = ta.sma(DX, len)


//Plot
hline(price=adxThreshhold,color=color.white,linestyle=hline.style_dashed)

ADXBuySignal    = DIPlus > diAbove and DIMinus < diBelow
ADXSellSignal   = DIMinus > diAbove and DIPlus < diBelow

plot(ADX, color=color.yellow, title="ADX")
plot(DIPlus, color=color.blue, title="+DI")
plot(DIMinus, color=color.purple, title="-DI")
plotshape (ADXBuySignal, color=color.green, style=shape.circle)
plotshape (ADXSellSignal, color=color.red, style=shape.circle)


// Trigger alerts
alertcondition(ADXBuySignal, title="ADXBuySignal", message="ADXBuySignal {{ticker}}")
alertcondition(ADXSellSignal, title="ADXSellSignal", message="ADXSellSignal {{ticker}}")```

Answer 1

您需要检查您的信号是否不是 true一个bar，并且它是 true在当前栏上。

isNewADXBuySignal = not ADXBuySignal[1] and ADXBuySignal
isNewADXSellSignal = not ADXSellSignal[1] and ADXSellSignal

alertcondition(isNewADXBuySignal, title="ADXBuySignal", message="ADXBuySignal {{ticker}}")
alertcondition(isNewADXSellSignal, title="ADXSellSignal", message="ADXSellSignal {{ticker}}")