The doji (Japanese: どうじ 同事; lit. 'same matter') is a commonly found pattern in a candlestick chart of financially traded assets (stocks, bonds, futures, etc.) in technical analysis. A Doji forms when the open and close of a candlestick are equal, or very close to equal. Considered a neutral formation suggesting indecision between buyers and sellers–bullish or bearish bias depends on previous price swing, or trend. Length of upper and lower shadows (wicks and tails) may vary giving the appearance of a plus sign, cross, or inverted cross.

It is characterized by being small in length—meaning a small trading range—with an opening and closing price that are virtually equal. The efficacy of technical analysis is disputed by the efficient-market hypothesis, which states that stock market prices are essentially unpredictable.

The doji represents indecision in the market. A doji is not as significant if the market is not clearly trending, as non-trending markets are inherently indicative of indecision. If the doji forms in an uptrend or downtrend, this is normally seen as significant, as it is a signal that the buyers are losing conviction when formed in an uptrend and a signal that sellers are losing conviction if seen in a downtrend.

A doji is a key trend reversal indicator. This is particularly true when there is a high trading volume following an extended move in either direction. When a market has been in an uptrend and trades to a higher high than the previous three trading days, fails to hold that high, and closes in the lower 10% of that day's trading range, there is a high probability of a downtrend in the ensuing days.

Likewise, when the market has been in a downtrend and trades to a new low that's lower than the three previous trading days, fails to hold that low, and closes in the upper 10% of that day's trading range, there is a high probability of an uptrend in the ensuing days.

A Doji indicator is mostly used in patterns, and it is actually a neutral pattern itself. Thus, when used alone, it doesn't provide reliable signals. By itself, the Doji candlestick only shows that investors are in doubt. However, there are main patterns that can be easily found on the chart.