EMA 9/21 Crossover + ATR Stops (v5)

//version=5
indicator("EMA 9/21 Crossover + ATR Stops (v5)", overlay=true)

emaFastLen = input.int(9, "EMA Fast")
emaSlowLen = input.int(21, "EMA Slow")
atrLen = input.int(14, "ATR Length")
slMult = input.float(1.0, "Stop x ATR", step=0.1)
tpMult = input.float(2.0, "Target x ATR", step=0.1)

emaF = ta.ema(close, emaFastLen)
emaS = ta.ema(close, emaSlowLen)
atr = ta.atr(atrLen)

longSignal = ta.crossover(emaF, emaS)
shortSignal = ta.crossunder(emaF, emaS)

// Optional guide levels for next bar after signal
longSL = longSignal ? close - atr * slMult : na
longTP = longSignal ? close + atr * tpMult : na
shortSL = shortSignal ? close + atr * slMult : na
shortTP = shortSignal ? close - atr * tpMult : na

plot(emaF, "EMA Fast", color=color.new(color.teal, 0))
plot(emaS, "EMA Slow", color=color.new(color.orange, 0))

plot(longSL, "Long SL", color=color.new(color.red, 0), style=plot.style_linebr)
plot(longTP, "Long TP", color=color.new(color.lime, 0), style=plot.style_linebr)
plot(shortSL, "Short SL", color=color.new(color.red, 0), style=plot.style_linebr)
plot(shortTP, "Short TP", color=color.new(color.lime, 0), style=plot.style_linebr)

plotshape(longSignal, title="Long", text="Buy", style=shape.labelup, color=color.new(color.lime, 0), location=location.belowbar)
plotshape(shortSignal, title="Short", text="Sell", style=shape.labeldown, color=color.new(color.red, 0), location=location.abovebar)

// Alerts
alertcondition(longSignal, title="EMA Long", message="EMA 9/21 LONG crossover")
alertcondition(shortSignal, title="EMA Short", message="EMA 9/21 SHORT crossunder")