An engulfing pattern is a two-candle signal where the second candle's body completely covers ("engulfs") the first's. A bullish engulfing — a big up-candle swallowing a prior down-candle — appears at bottoms; a bearish engulfing — a big down-candle swallowing a prior up-candle — appears at tops.

Why it carries weight

The pattern shows a decisive shift in one session. In a bullish engulfing, buyers didn't just nudge price up — they overwhelmed the entire prior down-move and closed above it. That kind of one-sided force, especially on rising volume, is more convincing than a small-bodied reversal candle. It's control changing hands, visibly.

Where it fails

Engulfing candles fire constantly in choppy, range-bound tape, where they're just noise reverting. They're most reliable at the end of an extended move, at a real level, on expanding volume. An engulfing candle that engulfs a tiny doji isn't impressive; one that swallows a large prior candle on heavy volume is.

Not every engulfing candle is a reversal. Size and location separate the signal from the noise.

The takeaway

Treat an engulfing pattern as evidence of a momentum shift that still needs to fit the bigger picture — the trend, the level, the dealer positioning. It's one of the stronger single candlestick signals precisely because it requires real force to form, but it's still one input, not a system.