Bollinger Bands Strategy With StopLoss

//@version=5
strategy(title="Bollinger Bands Strategy With StopLoss", overlay=false, shorttitle="BBS", pyramiding=0, currency=currency.USD, commission_type=strategy.commission.percent, commission_value=0.03, initial_capital=1000)
source = input(close, "Source")
length = input.int(20, minval=1)
mult = input.float(2.0, minval=0.001, maxval=50, step=0.001)
stopLossFactor = input.float(1, "Stop Loss Percent", maxval = 100, minval = 0, step=0.1)
basis = ta.sma(source, length)
dev = mult * ta.stdev(source, length)
upper = basis + dev
lower = basis - dev
var bool currentIsLong = na
var bool nextExpectedIsLong = true
buyEntry = ta.crossover(source, lower)
sellEntry = ta.crossunder(source, upper)
if (buyEntry and nextExpectedIsLong == true)
    strategy.entry("BBandLE", strategy.long, comment="BBandLE")
    nextExpectedIsLong := false
else
    strategy.cancel("BBandLE")
if (sellEntry and nextExpectedIsLong == false)
    strategy.entry("BBandSE", strategy.short, comment="BBandSE")
    nextExpectedIsLong := true
else
    strategy.cancel("BBandSE")
strategy.close("BBandLE", close < strategy.opentrades.entry_price(0) * (1 - (stopLossFactor / 100)))
strategy.close("BBandSE", close > strategy.opentrades.entry_price(0) * (1 + (stopLossFactor / 100)))
plot(source, "close", color.blue)
plot(lower, "lower", color.red)
plot(upper, "upper", color.red)
plot(strategy.opentrades.entry_price(0), "lastTradePrice", color.green)
plot(strategy.opentrades.entry_price(0) * (1 - (stopLossFactor / 100)), "stopLossLow", color.black)
plot(strategy.opentrades.entry_price(0) * (1 + (stopLossFactor / 100)), "stopLossHigh", color.black)
plotchar(strategy.position_size > 0, "OpenLongStatus", char="-", size=size.tiny, location=location.bottom, color=color.green)
plotchar(strategy.position_size < 0, "",char="-", size=size.tiny, location=location.bottom, color=color.red)
Expand (71 lines)