Bearish Evening Star Formation

The first part of an Evening Star reversal pattern is a large bullish green candle. On the first day, bulls are definitely in charge, usually new highs were made.
The second day begins with a bullish gap up. It is clear from the opening of Day 2 that bulls are in control. However, bulls do not push prices much higher. The candlestick on Day 2 is quite small and can be bullish, bearish, or neutral (i.e. Doji).
Generally speaking, a bearish candle on Day 2 is a stronger sign of an impending reversal. But it is Day 3 that is the most significant candlestick.

The last bar is a large red candle that opens below the middle candle and closes near the center of the first bar's body.