//@version=2
strategy("Drullmac", overlay=true)

//only trade when HullMA 250 is green, buy when HullMA16 turns green. sell when HullMA16 turns red

nTradable=input(title="tradable",type=integer,defval=250)
nSignal=input(title="period",type=integer,defval=14)

hullMA(n) =>
    n2ma=2*wma(close,round(n/2))
    nma=wma(close,n)
    diff=n2ma-nma
    sqn=round(sqrt(n))

    n2ma1=2*wma(close[1],round(n/2))
    nma1=wma(close[1],n)
    diff1=n2ma1-nma1
    sqn1=round(sqrt(n))

    n1=wma(diff,sqn)
    n2=wma(diff1,sqn)
    c=n1>n2?green:red
    [n1, n2]

[vTradable1, vTradable2] = hullMA(nTradable)
[vSignal1, vSignal2] = hullMA(nSignal)

isTradable = vTradable1 > vTradable2
isBullish = vSignal1 > vSignal2

plot(vTradable1,color=isTradable?green:red)
plot(vSignal1,color=isBullish?green:red)

longCondition = isTradable and isBullish
if (longCondition)
    strategy.entry("Long", strategy.long)

shortCondition = isTradable and (isBullish == false)
if (shortCondition)
    strategy.entry("Short", strategy.short)