Code for the video “Creating Complex Сustom Alerts in TradingView”

study(title="MA Cross Complex Alert", overlay=true)

// MAs
short = sma(close, 9)
long  = sma(close, 21)

// RSI
rsi_up   = rma( max(change(close), 0), 14)
rsi_down = rma(-min(change(close), 0), 14)
rsi = rsi_down == 0 ? 100 : rsi_up == 0 ? 0 : 100 - (100 / (1 + rsi_up / rsi_down))

// Williams %R
w_upper = highest(14)
w_lower = lowest(14)
w = 100 * (close - w_upper) / (w_upper - w_lower)

// Plot
plot(short, color = red)
plot(long,  color = green)
plot(cross(short, long) ? short : na, style = cross, linewidth = 4)

long_signal  = crossover( short, long) and rsi > 70  and w > -20
short_signal = crossunder( short, long) and rsi < 30 and w < -80

plotarrow(long_signal,   colorup = green)
plotarrow(-short_signal, colordown = red)

// alerts
alertcondition(long_signal,  title = "MA Complex long",   message = "MA long")
alertcondition(short_signal, title = "MA Complex short", message = "MA short")

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