What it means
A doji forms when the session's open and close are essentially equal, producing a candle with no real body — just upper and lower wicks. Four variants by wick distribution: long-legged doji (long wicks both sides, maximum indecision), gravestone doji (long upper wick, bearish at tops), dragonfly doji (long lower wick, bullish at bottoms), four-price doji (no wicks, all four prices equal — typically illiquid markets only).
Why it matters
Doji captures the moment of equilibrium — buyers and sellers exactly balanced. After a strong trend, a doji signals momentum exhaustion: the side that was driving the move can no longer push price further. Doji at trend extremes have ~55-65% reversal reliability per Bulkowski; doji in mid-range are noise.
How to use it
Doji alone is not a trade signal — it's a context signal. Trade it ONLY when (a) at a structural level (prior swing high/low, MA, prior pivot), (b) after a strong directional move (3+ sessions of trend), (c) confirmed by the NEXT candle reversing in the opposite direction. Stop beyond the doji's high (for bearish reversal) or low (bullish).
SPX July 2024: 5667 high on July 16, doji formed on July 17 (open 5667, close 5667, range 5658-5680), confirmed bearish on July 18 with red candle close below 5650. Decline to 5119 over next 3 weeks (-9.7%).
Four doji variants and their meanings
(1) Long-legged doji: long upper AND lower wicks. Maximum intra-session volatility with no directional resolution — strong indecision. (2) Gravestone doji: long upper wick, close at/near low, open at/near low. Buyers pushed up but completely failed; appears at tops as strong reversal signal. (3) Dragonfly doji: long lower wick, close at/near high. Sellers pushed down but were absorbed; appears at bottoms as strong reversal. (4) Four-price doji: open = high = low = close. Almost only in illiquid stocks or pre-market trade — not tradeable.
Context filters that turn noise into signal
Doji in mid-range have no predictive value. Three context filters that make doji actionable: (1) Location — doji at prior support/resistance or at trend swing-pivot has 2-3x the reliability of mid-range doji. (2) Prior trend strength — doji after 3+ trending sessions is exhaustion; doji after sideways action is noise. (3) Volume — doji on elevated volume (≥120% of 20-day average) is meaningful; on low volume it's just normal volatility.
Frequently asked
Is a doji bullish or bearish?
Neither inherently — doji is neutral indecision. The reversal direction depends on the prior trend: doji after an uptrend signals potential bearish reversal; doji after a downtrend signals potential bullish reversal. Without prior trend context, doji is just noise.
How tight does open-close need to be for a 'real' doji?
Typically within 5% of the day's range. A candle with open at 100 and close at 100.50 with daily range 99-101 has a body of 25% of range — that's NOT a doji, it's a small-bodied candle. True doji have bodies <5% of range; visually they look like horizontal lines.
Should I trade a doji alone?
No. Doji is a signal of potential reversal, not a confirmed reversal. Wait for the NEXT candle to close in the direction of the implied reversal before entering. About 35-45% of doji at trend extremes don't follow through — without confirmation you're trading a coin-flip.
Are doji more reliable in certain markets?
Doji are most reliable in liquid markets with continuous price discovery (major FX, large-cap stocks, futures). In illiquid markets, doji can form from a single trade and have no informational content. Crypto doji on small-cap altcoins are particularly unreliable due to low liquidity.
Want a worked example or a deeper dive? Ask Rocky how this concept applies to your specific watchlist or trade idea.
Ask Rocky