Doji

If the close and the open price are the same we see a doji.

Dragonfly doji

Dragonfly doji, this happens when the open and close price are equal to the high price.

A dragonfly doji indicate a reversal in a down trend.

A long-legged doji

A long-legged doji, this happens when the open and close are equal, but there has been a lot of volatility in the candle time frame.

A grave stone doji

A grave stone doji, this is the opposite of a dragonfly doji.

This indicates a reversal to an up trend.

This is very unusual and means a very quite time frame.