Concealing Swallow
"The Concealing Swallow is a four-line Japanese candlestick pattern which is indicative of a bearish reversal.
First, a black marubozu candle in a downtrend is formed, followed by a second black marubozu candle which opens within the prior candle's body and closes below the prior closing price.
The third candle has a smaller body which gaps below the prior closing price to form a new low, but also has a long upper shadow that extends into the previous body. The fourth candle is a long black candle that engulfs the third candles range, (body and shadow included) thus recording a new low."