A Doji is a candlestick pattern that forms when a security's opening and closing prices are virtually identical, resulting in a candle with a very small or non-existent body and wicks extending above and below. It visually represents a standoff between buyers and sellers, where neither side gained meaningful ground during the session. A Doji appearing after a prolonged uptrend or downtrend is a significant signal it suggests the prevailing momentum may be exhausting itself and a reversal could be imminent. There are several variants, including the Long-Legged Doji (extreme indecision), the Gravestone Doji (bearish reversal signal), and the Dragonfly Doji (bullish reversal signal). Confirmation through the following session's candle is essential before acting on a Doji signal.