Bullish Harami

What Does Bullish Harami Mean?
A candlestick chart pattern in which a large candlestick is followed by a smaller candlestick whose body is located within the vertical range of the larger body. In terms of candlestick colors, the bullish harami is a downtrend of negative-colored (black) candlesticks engulfing a small positive (white) candlestick, giving a sign of a reversal of the downward trend.

Investopedia explains Bullish Harami
Because the bullish harami indicates that the falling trend (bearish trend) may be reversing, it signals that it's a good time to enter into a long position. The smaller the second (white)  candlestick, the more likely the reversal.