How to identify...
1. 1st day is a long black day.
2. 2nd day is black forming a harami.
3. 2nd day's low sets a new low.
4. 3rd day is a short white day which is below the 2nd day.
Similar pattern(s)...
Bullish Morning Star spin off
Psychology...
The 1st day's long black candlestick enforces the bears position. The next day a new low is set, however it closes higher than the 1st day. The 3rd day produces some indecision on the part of the bears. Watch for the reversal confirmation of a new high on the next day.