So what are the engulfing candle rules?
The first thing you need for a the bullish engulfing candle is a downtrend and at the bottom you want a bearish candle.
You then want a bullish candle that opens at or below the previous close, and closes at or above the previous open.
You also want the close to be near the high of the candle, so no tails on the upside.
After the close, you get an engulfing bullish reversal, meaning you can expect price to move higher because buyers are in control.
The bullish engulfing pattern has a high reliability.