The short answer
A candlestick shows four prices for its period — open, high, low and close. The body is the open-to-close range; the wicks are the extremes. Only a handful of patterns are worth watching: the engulfing, the pin bar / hammer, and the doji. None of them work in isolation — a pattern at a strong support or resistance zone, in line with the trend, is a signal; the same pattern in the middle of nowhere is noise.
How to read a candlestick
Each candle encodes four numbers. The body runs from the open to the close — filled or coloured one way if price closed down, the other if it closed up. The thin wicks (or shadows) above and below mark the high and low the period reached but did not hold.
That is the whole language. A long body means one side dominated the period; long wicks mean price was rejected from an extreme. Everything about candlestick patterns is just combinations of bodies and wicks telling you who won the fight.
What a pattern really tells you
A candlestick pattern is a snapshot of a shift in the balance between buyers and sellers. An engulfing candle says momentum flipped hard in one period; a long wick says an attempt in one direction was firmly rejected. That is genuine information.
What a pattern is not is a standalone buy or sell button. Backtests of raw patterns with no context show little edge. The value appears only when the pattern confirms something the chart was already suggesting.
The engulfing pattern
A bullish engulfing is an up candle whose body completely covers the previous down candle's body — buyers overwhelmed sellers in a single period. A bearish engulfing is the mirror image. It is the clearest one-candle sign of a momentum shift.
It carries weight when it forms at a level: a bullish engulfing off a tested support zone is a real reversal cue. The same candle mid-range is just a big candle.
The pin bar and hammer
A pin bar (the hammer and shooting star are versions of it) has a small body and one long wick. The long wick shows price pushed hard in one direction and was rejected, closing back near the open — a failed attempt.
A hammer with a long lower wick at support says sellers tried to break lower and could not. Like the engulfing, its edge comes from where it prints, not the shape alone.
The doji
A doji has almost no body — the open and close are nearly equal — with wicks on one or both sides. It signals indecision: neither side controlled the period. After a strong run, a doji can warn that momentum is stalling.
On its own a doji is weak; it is a caution flag, not a trade. Use it to tighten attention, then wait for the next candle to resolve the indecision before acting.
Why context is everything
The mistake that costs beginners money is trading patterns anywhere they appear. A pattern is a trigger, and a trigger needs a reason. Stack the odds: the right pattern, at a strong level, in the direction of the higher-timeframe trend.
When those three agree you have a genuine setup; when only the candle is present you have a coin flip with a nice name. Learn a few patterns well, demand context, and let the rest go. Risk is still sized from the stop, not the pattern's promise.
Frequently Asked Questions
What are the most reliable candlestick patterns?
The engulfing, the pin bar (hammer and shooting star) and the doji are the few worth watching. Even these only have an edge when they appear at a meaningful level and in line with the trend.
How do you read a candlestick?
The body shows the open-to-close range and the wicks show the high and low. A long body means one side dominated the period; long wicks mean price was rejected from that extreme.
What is a bullish engulfing pattern?
An up candle whose body completely covers the previous down candle's body, showing buyers overwhelmed sellers in a single period. It is most meaningful at a tested support zone.
Do candlestick patterns actually work?
Not in isolation — raw patterns show little edge in backtests. They work when they confirm existing context: the right pattern at a strong support or resistance level, in the direction of the trend.
What does a doji candle mean?
A doji has almost no body, so the open and close are nearly equal. It signals indecision between buyers and sellers and can warn that momentum is stalling after a strong move.