A bullish engulfing pattern is a two-candlestick reversal pattern that typically appears at the end of a downtrend. In this setup, the first candle is bearish (red/black) and relatively small, followed by a larger bullish candle (green/white) that completely engulfs the previous candle’s body. This shows that buyers have strongly taken control, overpowering the sellers, and it often signals the potential start of an upward reversal. The reliability of the pattern increases when it forms near a key support zone or after an extended decline, and traders usually look for higher volume or further bullish confirmation in the next candles before acting.