The dark cloud is the opposing piercing pattern. It is characterized by a candlestick that gaps up from the previous close continuing the bullish trend apparently, but then the bears take-over, and price closes beyond the previous candlesticks mid-body.

The term "piercing" refers to the fact that the signal candlestick "pierces" the mid-body of the previous candlestick.

This candlestick is very high probability.

Telechart PCF - coming