//@version=5
strategy(title="Three ATR EMA Strategy", shorttitle="3ATR-EMA Strategy", overlay=true, currency=currency.USD, initial_capital=10000, default_qty_type=strategy.percent_of_equity, commission_type=strategy.commission.percent, commission_value=0.1)

// Inputs
ema_length = input.int(21, "EMA Length", minval=1)
atr_multiplier = input.float(3.0, "ATR Multiplier", step=0.1)
show_bulls = input.bool(true, "Show Bullish Markers")

// Calculate EMA and ATR-based bands
ema = ta.ema(close, ema_length)
upper_band = ema + (ta.atr(ema_length) * atr_multiplier)
lower_band = ema - (ta.atr(ema_length) * atr_multiplier)

// Strategy Conditions
bullish_entry = (close < ema) and 
               (close[1] <= lower_band[1]) and 
               (close > close[1])

// Execute strategy orders
if bullish_entry
    strategy.entry("Long", strategy.long)

// Visual elements (optional)
plot(ema, "EMA", color=color.new(#4A90E2, 0))
plot(upper_band, "Upper", color=color.new(#F5A623, 0))
plot(lower_band, "Lower", color=color.new(#7ED321, 0))

plotshape(show_bulls and bullish_entry ? low : na,
          style=shape.triangleup, 
          location=location.belowbar, 
          color=color.new(#00FF00, 0),
          size=size.small,
          title="Bull Signal")