Why candlesticks became the default
Most crypto charting sites show candlesticks by default. Each candle packs four prices from one period into a single shape: the open, the high, the low and the close. A line chart keeps only one of those numbers, so candles let you see how violent or calm a period was at a glance.
This article is about reading the candle itself, the timeframe it covers and the volume bar beneath it. For the wider picture of axes and scales, the broader guide to chart analysis covers that ground.
Anatomy of a candle
A candle has two parts.
- The body is the thick rectangle between the open and the close.
- The wicks, also called shadows, are the thin lines above and below the body. The top of the upper wick is the highest price traded in the period, and the bottom of the lower wick is the lowest.
Colors depend on the platform, but the usual convention is that one color means the close was above the open (price rose during the period) and another means the close was below the open. Many sites use green and red, others use different pairs, and some let you choose. Always check the legend rather than assuming.
A simple illustration with made-up numbers: suppose a daily candle opens at 100, reaches a high of 110, drops to a low of 95 and closes at 105. The body runs from 100 to 105, the upper wick stretches from 105 up to 110, and the lower wick stretches from 100 down to 95. The close is above the open, so this would be drawn as a rising candle.
What body and wick sizes suggest
Size gives context, with the caveat that it describes what happened, not what comes next.
- A long body means the close was far from the open. Price moved mostly in one direction during the period.
- A short body means open and close were near each other, which can happen in a quiet period or when price swung both ways and ended where it began.
- Long wicks mean price travelled far from the body and then came back. Traders often read a long lower wick as buyers stepping in at lower prices, and a long upper wick as sellers appearing at higher prices. That is an interpretation of one period, and other explanations are possible, such as a brief rush of forced orders.
Named single-candle shapes, such as a candle with a tiny body and long wicks on both sides, exist in many guides. Treat the names as descriptive labels. There is no dependable evidence that particular candle shapes reliably predict the next move, and in a market as erratic as crypto it is wise to expect plenty of false signals.
Timeframes change the story
Each candle spans a fixed period, chosen by you: a minute, an hour, a day, a week. A daily candle is simply the combination of everything that happened in that day, so a single daily candle could be built from twenty-four hourly candles, each with its own shape.
This has practical consequences.
- A long wick on a one-hour chart may disappear into the body of the daily candle.
- Markets trade around the clock, so a “daily” candle depends on where the platform sets its cutoff, usually midnight UTC. Candles from different sites can therefore differ slightly.
- Short timeframes contain more random movement. A string of rising one-minute candles can sit inside a falling day.
Looking at a longer timeframe for context and a shorter one for detail is a common routine. It also helps to remember that the typical size of candles tells you about price volatility, since bigger average candles mean bigger swings.
Source and price differences
The candle you see is only as reliable as the data behind it. A candle drawn from a single exchange reflects trades on that venue, which follow the rules explained under exchange pricing. A thinly traded pair can show dramatic wicks produced by a few orders, particularly where market liquidity is low. Comparing the same period on two sources is a quick way to check whether a spike was real across the market or local.
Reading volume bars
Under the candles you will usually see volume bars, one per candle, showing how much was traded during that period. Some sites color them to match the candle.
Ways volume is commonly used:
- A large move on high volume suggests more activity behind it than the same move on low volume.
- A spike in volume at a turning point can mark a period of heavy disagreement between buyers and sellers.
- A steady decline in volume during a drift higher or lower may suggest fading interest, though it is not proof of anything.
Volume has limits. Different sites measure it differently, some figures include trades that do little to reflect real demand, and the number may be in coin units or in dollar terms. Because reported volume can be inflated, the measure is worth treating cautiously; the nature of those problems is explained under trading volume.
Putting it together, carefully
A candle plus its volume describes who did what during one period. A sequence of candles shows how that behaviour evolved, which is the raw material for talk of chart patterns and support and resistance. It is useful practice to describe a candle in words before interpreting it: “opened here, fell to there, recovered to close near the open, on higher volume than the last ten candles”. That description is factual. Whatever you conclude afterwards is a guess.
Cryptocurrency prices are volatile, patterns that look clear in hindsight are far harder to spot in real time, and no way of reading candles reliably produces profit. Treat candlesticks as a way to understand market history, and remember that this article is educational and not financial advice.