On remplacera simplement les instructions graphiques permettant de tracer des chandeliers par une variable auquelle on affectera la valeur 1 ou -1. (cf. la formation à la programmation : https://www.prorealcode.com/courses/premiers-pas-avec-la-programmation-pour-prorealtime/

//Donchian bias determinator indicator
//05-11-2017
//Marcel van Vliet

// mmTYPE=1 (mm type)

//irsi = rsi[14]
Upper = HIGHEST[55](HIGH[1])
Lower = LOWEST[55](LOW[1])
//Middle = (Upper + Lower) / 2

//bodyhigh = max(open,close)
//bodylow = min(open,close)
//
//if(open<=close and close > Upper) then
//LongWickUp = high
//LongCandleUp = bodyHigh
//LongWickDown = low
//LongCandleDown = bodyLow
//elsif(open>=close and close > Upper) then
//LongWickUp = low
//LongCandleUp = bodyLow
//LongWickDown = high
//LongCandleDown = bodyHigh
//elsif(open<=close and close < Lower) then
//ShortWickUp = high
//ShortCandleUp = bodyHigh
//ShortWickDown = low
//ShortCandleDown = bodyLow
//elsif(open>=close and close < Lower) then
//ShortWickUp = low
//ShortCandleUp = bodyLow
//ShortWickDown = high
//ShortCandleDown = bodyHigh
//elsif(open<=close and close < Upper and close > Lower) then
//RangeWickUp = high
//RangeCandleUp = bodyHigh
//RangeWickDown = low
//RangeCandleDown = bodyLow
//elsif(open>=close and close < Upper and close > Lower) then
//RangeWickUp = low
//RangeCandleUp = bodyLow
//RangeWickDown = high
//RangeCandleDown = bodyHigh
//endif

//bullish candlesticks
if close>Upper then
//DRAWCANDLE(LongCandleDown,LongWickUp,LongWickDown,LongCandleUp) coloured(0,0,102)
signal=1
endif

//bearish candlesticks
if close<Lower then
//DRAWCANDLE(ShortCandleDown,ShortWickUp,ShortWickDown,ShortCandleUp) coloured(102,0,0)
signal=-1
endif

//neutral candlesticks (Donchian channel)
if close<Upper and close>Lower then
//DRAWCANDLE(RangeCandleDown,RangeWickUp,RangeWickDown,RangeCandleUp) coloured(150,150,150)
signal=0
endif

RETURN signal//upper AS "upper", lower AS "lower", middle AS "middle"

Toutes les références aux variables nécessaires pour la construction des bougies ont aussi été supprimées.