A candlestick chart displays price movement over set time periods, with each candle showing four data points: open, high, low, and close. Originating with Japanese rice traders in the 18th century, the technique reached Western markets through Steve Nison's 1991 book. On essentially every crypto exchange it remains the default format.
Anatomy of a candle
Covering one time period each. A candle spans one minute, four hours, or a day, and the interval you pick determines almost everything about what the resulting chart appears to be telling you.
The body is the thick rectangle, spanning the opening and closing price. Green or white means the close came in higher than the open. Red or black means lower.
The wicks, also called shadows, are the thin lines above and below. Reaching the period's highest price is the upper wick. The lower reaches the lowest.
So a single candle carries four things at once: where price started, where it ended, and the full range traveled in between. Considerably more than a line chart, which plots closing prices only.
What a candle's shape tells you
| Shape | What it shows |
|---|---|
| Long body, short wicks | Strong directional move that held |
| Short body, long wicks | Indecision. Price moved both ways and settled near the open |
| Long lower wick | Sellers pushed down, buyers pushed back |
| Long upper wick | Buyers pushed up, sellers pushed back |
| No body (doji) | Open and close nearly identical. Equilibrium |
Information the body cannot carry sits in the wicks. Closing green with a long upper wick tells you buyers won the period and lost the high, which is a materially different story from a green candle with no upper wick.
How timeframes change what a chart shows
Depending on the interval, the same market produces completely different charts.
On a one-minute chart you see noise. On a daily chart, trend. On a weekly chart, cycle. None is more correct than the others, and a pattern that looks decisive on a five-minute chart frequently vanishes on the daily.
One practical consequence follows from crypto trading continuously, with no close and no weekend. At whatever cutoff the exchange uses, usually midnight UTC, daily candles break. Different venues can therefore show slightly different daily candles for the same asset.
Common candlestick patterns, and the honest caveat
Recurring shapes get names. Among the most cited:
- Doji. Open and close nearly equal, indicating indecision.
- Hammer. Small body with a long lower wick, appearing after a decline.
- Shooting star. Small body with a long upper wick, appearing after an advance.
- Engulfing. A candle whose body completely covers the previous one.
- Marubozu. A long body with almost no wicks, showing one side controlled the entire period.
Here is the caveat most pattern guides omit. What already happened is what these describe, and only that. Predictive records are weak, identification is subjective, and the same pattern appears constantly in charts that go nowhere. As a vocabulary for describing price action, they work well. As a forecasting tool, considerably less so.
Reading candles alongside volume
Candlesticks alone show price. Without trading volume, that is half the picture.
On heavy volume, a large green candle reflects broad participation. The identical candle on almost no volume reflects a handful of trades, which says far more about thin liquidity than about demand.
On smaller altcoins that distinction matters most, since a single order can produce a dramatic-looking candle that means nothing.
What candlestick charts do not tell you
- Nothing about why. A candle records movement, not cause.
- Nothing about what comes next. Every pattern that "predicts" a reversal also appears constantly before continuations.
- Nothing about order book depth. Price printed at a level says nothing about how much size was available there.
- Nothing about whether volume was real. A National Bureau of Economic Research study published in December 2022 found wash trading averaged 77.5% of reported volume across 29 unregulated exchanges.
- Nothing that survives an outage. During the crash of 10 October 2025, several venues went down and charts showed prices nobody could trade at.
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Frequently asked questions
What do the colors on a candlestick mean?
Green or white means the price closed higher than it opened during that period. Red or black means lower. Color schemes vary by platform, and the open-versus-close relationship is what matters.
What are the wicks on a candle?
The thin lines above and below the body, showing the highest and lowest prices reached during the period. Revealing the full range traveled, they show what the body alone cannot.
Who invented candlestick charts?
Japanese rice traders developed the technique in the 18th century. Through his 1991 book, Steve Nison introduced it to Western markets, after which it became a standard format.
What timeframe should I use for candlestick charts?
That depends entirely on what you are looking at. Short intervals show noise, daily charts show trend, and weekly charts show cycle position. A pattern visible on one timeframe often vanishes on another.
Do candlestick patterns actually work?
Describing price action, reliably. Predicting it, poorly. The same shapes appear constantly before both reversals and continuations, and identification is subjective enough to resist rigorous testing.
What is a doji?
A candle where open and close are nearly identical, producing almost no body. Neither buyers nor sellers finished the period in control.
Why do different exchanges show different daily candles?
Because crypto never closes, each venue chooses its own daily cutoff, usually midnight UTC. Different cutoffs and different order books then produce slightly different candles.
Should I read candles with other indicators?
Volume is the most common pairing, since a candle's meaning changes entirely depending on how much traded behind it. The other common overlay is support and resistance.
