ChatGPT Strategy by Kralow (Youtube)

//@version=5
strategy(shorttitle='ChatGPT Strategy by Kralow', title='Bollinger Bands', overlay=true, currency=currency.NONE, initial_capital=1000, default_qty_type=strategy.percent_of_equity, default_qty_value=100)

src = input(close)
length = input.int(34, minval=1)
mult = input.float(2.0, minval=0.001, maxval=50)

basis = ta.sma(src, length)
dev = ta.stdev(src, length)
dev2 = mult * dev

upper1 = basis + dev
lower1 = basis - dev
upper2 = basis + dev2
lower2 = basis - dev2

colorBasis = src >= basis ? color.blue : color.orange

pBasis = plot(basis, linewidth=2, color=colorBasis)
pUpper1 = plot(upper1, color=color.new(color.blue, 0), style=plot.style_circles)
pUpper2 = plot(upper2, color=color.new(color.blue, 0))
pLower1 = plot(lower1, color=color.new(color.orange, 0), style=plot.style_circles)
pLower2 = plot(lower2, color=color.new(color.orange, 0))

fill(pBasis, pUpper2, color=color.new(color.blue, 80))
fill(pUpper1, pUpper2, color=color.new(color.blue, 80))
fill(pBasis, pLower2, color=color.new(color.orange, 80))
fill(pLower1, pLower2, color=color.new(color.orange, 80))

// Strategy Entry and Exit Conditions
longCondition = close > upper2
shortCondition = close < lower2

if longCondition
    strategy.entry("Long", strategy.long)

if shortCondition
    strategy.entry("Short", strategy.short)

var float long_trailing_stop = na
var float short_trailing_stop = na

if strategy.position_size > 0
    long_trailing_stop := close > long_trailing_stop ? close : long_trailing_stop - dev2

if strategy.position_size < 0
    short_trailing_stop := close < short_trailing_stop ? close : short_trailing_stop + dev2

strategy.exit("Long", "Close Long", stop = long_trailing_stop)
strategy.exit("Short", "Close Short", stop = short_trailing_stop)