Money Management

study(title="Money Management", overlay=false)
equity=input(title="Equity", type=float, defval=3000, minval=2000)
risk=input(title="Risk per trade", type=float, defval=0.02, minval=0.01, maxval=0.99)

mainTF=period=="W"?"M":period=="D"?"W":period=="240"?"D":period=="60"?"D":period=="45"?"W":period=="30"?"240":period=="15"?"60":period=="10"?"60":period=="5"?"30":period=="3"?"15":period=="2"?"10":period=="1"?"5":""

trueRange0=max(abs(high - close[1]), abs(low - close[1]))
trueRange=max((high - low), trueRange0)
atr=ema(trueRange,24)
Satr=security(tickerid, mainTF, atr)


plotchar(close-2*Satr, color=red)
plotchar(close-Satr, color=red)
plotchar(close+Satr, color=green)
plotchar(close+2*Satr, color=green)

plotchar(equity*risk/Satr, color=green)