10MA Crosses Above 20MA

//version=5
indicator("10MA Crosses Above 20MA", overlay=true)
ma10 = ta.sma(close, 10)
ma20 = ta.sma(close, 20)
plot(ma10, color=color.orange, title="10MA")
plot(ma20, color=color.blue, title="20MA")

crossUp = ta.crossover(ma10, ma20)
alertcondition(crossUp, title="10MA Crosses Above 20MA", message="10MA升穿20MA，可能是買入訊號！")