It is a pattern that resembles a hammer.
The body of the candle is small and consists of a single candle.
Its lower shadow should be at least twice the body of the candle.
It should have a very small upper shadow or no upper shadow at all, and the longer the lower shadow is compared to the body of the candle, the better.
It comes at the end of a downward trend to indicate the possibility of a reversal.
