My script

/version=5
indicator("dvp - Engulfing Strategy", overlay=true)

// Moving Averages
sma1 = input.int(6,"Trend SMA")
ema1 = input.int(3,"Engulf EMA")
sma6 = ta.sma(close, sma1)
ema3 = ta.ema(close, ema1)

// Helper candles
c3 = close[2] < open[2] // 3 days ago was a red candle
c2 = close[1] > open[1] // 2 days ago was a green candle

engulfed = (low[1] < low[2]) and (high[1] > high[2]) // bullish engulfing

c0_bull = close > open // current candle is green
close_above_c2high = close > high[1]
c3_below_sma6 = close[2] < sma6[2]
c0_above_ema3 = close > ema3

// Bullish Engulfing Conditions
bullishSignal = c3 and c2 and engulfed and c0_bull and close_above_c2high and c3_below_sma6 and c0_above_ema3

// Plotting text for bullish engulfing
plotshape(bullishSignal, title="Bullish Engulfing", location=location.belowbar, color=color.green, style=shape.labelup, text="BuE")

// Optional: Bearish Engulfing Detection
c3_bear = close[2] > open[2] // 3 days ago green
c2_bear = close[1] < open[1] // 2 days ago red

engulfed_bear = (high[1] > high[2]) and (low[1] < low[2])

c0_bear = close < open // current red
close_below_c2low = close < low[1]
c3_above_sma6 = close[2] > sma6[2]
c0_below_ema3 = close < ema3

bearishSignal = c3_bear and c2_bear and engulfed_bear and c0_bear and close_below_c2low and c3_above_sma6 and c0_below_ema3

plotshape(bearishSignal, title="Bearish Engulfing", location=location.abovebar, color=color.red, style=shape.labeldown, text="BeU")

// Plotting Moving Averages
plot(sma6, color=color.orange, title="SMA 6")
plot(ema3, color=color.blue, title="EMA 3")
```