A bullish reversal pattern made of two candles. It can be recognized when a little red candlestick that represents a bearish trend is followed the next day by a large green candlestick. The large green candlestick opens lower than the previous day's finish and closes higher than the previous day's opening, with the body of the latter completely engulfing or overlapping the former. The bullish engulfing is a bullish reversal pattern, especially when there's presence of significant volume increase on the engulfing day.