EMA9/EMA20 + VolMA20 Alert

//version=5
indicator("EMA9/EMA20 + VolMA20 Alert", overlay=true)

ema9 = ta.ema(close, 9)
ema20 = ta.ema(close, 20)

volMa20 = ta.sma(volume, 20)

crossUp = ta.crossover(ema9, ema20)
volOK = volume > volMa20

signal = crossUp and volOK

plot(ema9, color=color.yellow, linewidth=2)
plot(ema20, color=color.blue, linewidth=2)

plotshape(signal, title="Signal", style=shape.triangleup, color=color.lime, size=size.small, location=location.belowbar)

alertcondition(signal, title="Pump Signal", message="EMA9 crossed EMA20 with strong volume (Vol>MA20)")