//@version=4
strategy(title="Ichimoku Cross Strategy", overlay=true, max_bars_back=10, pyramiding=1, default_qty_type=strategy.percent_of_equity, default_qty_value=75, initial_capital=1000, currency="EUR", commission_type=strategy.commission.percent, commission_value=0.075)

//setting baktesting period
testPeriodStart = timestamp(2017,12,15,0,0)
testPeriodStop = timestamp(2019,8,24,0,0)

//Ichimoku indicator
conversionPeriods = input(20, minval=1, title="Conversion Line Periods"),
basePeriods = input(60, minval=1, title="Base Line Periods")
laggingSpan2Periods = input(120, minval=1, title="Lagging Span 2 Periods"),
displacement = input(30, minval=1, title="Displacement")

donchian(len) => avg(lowest(len), highest(len))

conversionLine = donchian(conversionPeriods)
baseLine = donchian(basePeriods)

//Long/Short triggers
longTrigger = crossover(conversionLine, baseLine)
shortTrigger = crossunder(conversionLine, baseLine)

//strategy
//if time >= testPeriodStart
fromYear = year > 2017
toYear = year < 2020

    //if longTrigger == true
        //strategy.exit("exitShort", "Short")
strategy.entry("Long", strategy.long, when = longTrigger and fromYear)
strategy.close_all(when = shortTrigger and fromYear)

strategy.entry("Short", strategy.short, when = shortTrigger and fromYear)
strategy.close_all(when = longTrigger and fromYear)

//if shortTrigger == true
        //strategy.close_all(when = crossunder(conversionLine, baseLine))
        //strategy.entry("Short", strategy.short)

    //strategy.exit("Long", when = overbought)
    //strategy.exit("Short", when = oversold)

plotshape(shortTrigger, style=shape.triangledown, color=color.red, size=size.large)
plotshape(longTrigger, style=shape.triangleup, color=color.green, size=size.large)