A Doji is a candlestick pattern used in technical analysis to indicate market indecision. It forms when the opening and closing prices of a security are nearly the same, resulting in a small body with long wicks. This pattern can appear in various time frames and is often seen in charts of stocks, commodities, and currencies. Traders interpret a Doji as a potential reversal signal, suggesting that the current trend may be losing momentum. It is important to consider the context in which a Doji appears, as its significance can vary depending on preceding price action and other indicators like support and resistance levels.