Custom Sell Signal - MACD + EMA + Volume

//version=5
indicator("Custom Sell Signal - MACD + EMA + Volume", overlay=true)

// MACD Settings
fast_length = 12
slow_length = 26
signal_smoothing = 9
[macdLine, signalLine, _] = ta.macd(close, fast_length, slow_length, signal_smoothing)

// 50 EMA
ema50 = ta.ema(close, 50)

// Volume Moving Average (20 SMA)
volSMA = ta.sma(volume, 20)

// Conditions
macdCrossBelow = ta.crossunder(macdLine, signalLine)
macdAboveZero = macdLine > 0
closeNearOrBelowEMA50 = close <= ema50 * 1.005 // Adjust buffer (0.5%) if needed for "near"
volumeAboveSMA = volume > volSMA

// Final Sell Condition
sellCondition = macdCrossBelow and macdAboveZero and closeNearOrBelowEMA50 and volumeAboveSMA

// Plotting
plot(ema50, color=color.blue, title="50 EMA")

// Sell Signal Plot
plotshape(sellCondition, title="Sell Signal", location=location.abovebar, color=color.red, style=shape.triangledown, size=size.small)

// Alert Condition
alertcondition(sellCondition, title="Sell Signal Alert", message="Sell Signal Generated")