The bullish Three Inside Up reversal pattern occurs during a downtrend. The first two candle are a Bullish Harami, a two day pattern that has a small body day completely contained within vertical range of the previous larger candle’s body. This formation suggest that the previous trend is coming to an end. The smaller the second candlestick, the stronger the reversal signal. The Bullish Harami is confirmed by a third white candlestick, with a higher close than the second day.
The bearish Three Inside Up pattern occurs during a downtrend. The first two days are a Bearish Harami, where the second candle is contained withing the body of the larger candle. The third, confirming candlestick is black and has a lower close than the second candlestick.