EMA 20/40 Crossover

//version=5
indicator(title="EMA 20/40 Crossover", shorttitle="EMA Cross", overlay=true)

// Calculate EMAs
ema20 = ta.ema(close, 20)
ema40 = ta.ema(close, 40)

// Detect crossovers
bullCross = ta.crossover(ema20, ema40) // EMA20 crosses above EMA40 (Buy signal)
bearCross = ta.crossunder(ema20, ema40) // EMA20 crosses below EMA40 (Sell signal)

// Plot EMA lines
plot(ema20, color=color.blue, title="EMA 20", linewidth=2)
plot(ema40, color=color.red, title="EMA 40", linewidth=2)

// Plot signals
plotshape(series=bullCross, title="Buy Signal", location=location.belowbar, style=shape.labelup, size=size.small, color=color.green, text="BUY")
plotshape(series=bearCross, title="Sell Signal", location=location.abovebar, style=shape.labeldown, size=size.small, color=color.red, text="SELL")

// Alert setup (optional)
alertcondition(bullCross, title="EMA Bullish Cross", message="EMA 20 crossed above EMA 40 - BUY!")
alertcondition(bearCross, title="EMA Bearish Cross", message="EMA 20 crossed below EMA 40 - SELL!")