Bullish Engulfing: low <= low[1]: The low of the current candle is lower than or equal to the low of the previous candle. close >= close[1]: The close of the current candle is higher than or equal to the close of the previous candle. close > open: The current candle is bullish. open[1] > close[1]: The previous candle is bearish.
Bearish Engulfing: high >= high[1]: The high of the current candle is higher than or equal to the high of the previous candle. close <= close[1]: The close of the current candle is lower than or equal to the close of the previous candle. close < open: The current candle is bearish. open[1] < close[1]: The previous candle is bullish.
Plot shape: Displays a signal on the chart when a bullish engulfing pattern (green color) or a bearish engulfing pattern (red color) is detected.
Alert condition: Sets an alert to send a notification when a bullish or bearish engulfing pattern is detected.