How to Read a Crypto Chart: Candlesticks, Volume, Timeframes

OHLC candlesticks, timeframes, volume, support and resistance, log scale: the basics of reading a crypto chart without telling yourself stories.

Trading · Débutant · 11 min read · Publié le September 28, 2026

The essentials

This guide is general information and does not constitute investment advice.

Why learn to read a chart

Even if you don't trade actively, knowing how to read a platform's chart saves you from misreadings: believing an asset is "collapsing" when it's just returning to where it was a week ago, or buying at the top of a wick that lasted a few minutes.

Keep one idea in mind throughout this guide: a chart describes the past. The tools presented here help you structure your reading, place orders more thoughtfully and manage your risk. None of them guarantees a result.

Anatomy of a candle: OHLC

The most common chart is the Japanese candlestick chart, or candles. Its invention is often credited to Homma, a Japanese rice trader, and it was popularized in the West by Steve Nison in 1991.

Each candle summarizes a period with four prices, abbreviated OHLC:

Open: the first price traded during the period;
High: the highest price reached;
Low: the lowest price reached;
Close: the last price traded during the period.

These four prices draw two elements:

The body: the rectangle between the open and the close.
The wicks (or shadows): the lines above and below the body, reaching up to the high and down to the low.

By convention, a green (or white, hollow) candle means the close is higher than the open: the price rose over the period. A red (or black, filled) candle means the close is lower than the open. Colors are often customizable, so check your platform's settings.

What a candle doesn't tell you

A candle doesn't show the order in which events happened. A green candle with a long lower wick may mean the price first dropped and then climbed back, but it doesn't say how long it stayed down there, or what happened in between. To find out, you need to drop to a shorter timeframe.

Candlestick "patterns" (hammer, shooting star, engulfing...) are very popular. They describe frequent setups, but guarantee no prediction: treat them as clues, never as certain signals.

Timeframes: the time scale changes everything

The timeframe is the duration represented by a single candle: 1 minute, 15 minutes, 1 hour, 4 hours, 1 day, 1 week, and so on.

The same market can tell opposite stories depending on the timeframe you pick:

Timeframe	What you see	Common use
1 min to 15 min	A lot of "noise," fast moves	Order execution, very short-term trading
1 h to 4 h	Trends over a few days	Tracking short-term positions
1 day to 1 week	Underlying trend, major price zones	Big picture, investing

A few useful habits:

Start from the top. Look at the weekly or daily chart first to get the context, then zoom in if needed.
Wait for the close. A candle in progress can change shape completely before it closes. A "breakout" in the middle of a 4-hour candle is only confirmed at its close.
Be wary of small timeframes. On a one-minute chart, a single large order can draw a spectacular wick with no lasting meaning.
Check the time zone. Daily candles on crypto platforms often start at midnight UTC, which is 1 or 2 a.m. in France depending on the season.

Volume: who was there?

Volume is the quantity of units traded over a period. It's usually displayed as bars below the chart, one bar per candle.

The idea is simple: a price move accompanied by high volume reflects broader participation, so it carries more "weight." Conversely, a move on low volume may reflect a fragile trend. In a healthy uptrend, you often expect to see volume grow; a decline accompanied by rising volume suggests selling pressure is intensifying.

Three precautions:

Volume is specific to each platform. An exchange's chart only shows trades executed on that exchange, not the whole market.
Volume can be inflated. On loosely supervised platforms or illiquid tokens, artificial trades (an actor buying from and selling to themselves) can give a false impression of activity.
Compare volume with itself. A bar is only "high" relative to the previous bars of the same asset, on the same platform and the same timeframe.

Support and resistance: zones, not lines

A support is a price zone where buying has, in the past, slowed a decline. A resistance is a zone where selling has slowed a rise. These levels often appear around old highs or lows, or round numbers.

Think of them as zones rather than lines accurate to the dollar. Wicks often overshoot a level by a few percent before the price comes back. Drawing a band (for example between $58,000 and $59,000) reflects reality better than a line at exactly $58,500.

A few common observations, to be taken with caution:

a zone tested several times is more visible to participants, so it's more closely watched;
a resistance that has been broken sometimes then acts as a support, and vice versa;
a zone spotted on a long timeframe (daily, weekly) is generally considered more significant than one seen on 5 minutes;
a level is never a guarantee: it can give way without warning, especially during an announcement or a wave of liquidations.

In practice, these zones are mostly useful for placing orders thoughtfully: a limit order near a support, a stop a bit below it rather than right on it.

Linear or logarithmic scale

A chart's vertical axis can be displayed in two ways:

Linear scale: each identical price gap takes up the same height. Going from 10,000 to 20,000 takes as much space as going from 90,000 to 100,000.
Logarithmic scale: each identical percentage change takes up the same height. A doubling from 10,000 to 20,000 takes as much space as a doubling from 50,000 to 100,000.

Why does this matter in crypto? Because prices have sometimes been multiplied by 10 or 100 over a few years. On a linear scale, all the early history gets squashed at the bottom of the chart and recent moves look disproportionate. On a log scale, you compare relative changes, which better reflects what your portfolio experiences.

Simple rule: use the logarithmic scale for long views (several months or years) and the linear scale for short views, where the difference is small. Be aware that trend lines drawn on one scale don't land in the same place on the other.

Two common indicators, with their limits

Technical indicators are calculations applied to past prices or volumes. They contain no extra information: they restate the chart's data.

Moving averages

A moving average displays the average price over a given number of periods, recalculated with every new candle.

The simple moving average (SMA) gives the same weight to each period.
The exponential moving average (EMA) gives more weight to recent prices, which makes it more responsive.

The 50-day and 200-day averages are widely followed. When a short average crosses above a long one, it's called a "golden cross"; the opposite is called a "dead cross" (or "death cross").

Main limitation: a moving average lags by construction. It reacts to what has already happened, and this lag grows with the length of the period. Crossovers combine two lagging indicators and work mostly in clearly trending markets; in a directionless market, they produce a lot of false signals.

The RSI

The RSI (Relative Strength Index) was created by J. Welles Wilder Jr. and introduced in 1978. It's a momentum oscillator between 0 and 100, calculated by default over 14 periods.

Classic reading: above 70, the asset is said to be "overbought"; below 30, "oversold." People also look at divergences: for example, a price making a new high while the RSI makes a lower high.

Main limitation: "overbought" doesn't mean "about to fall." In a strong trend, the RSI can stay above 70 (or below 30) for a long time. Selling every time it crosses above 70 in a bull market can be costly.

A word on profitability

No indicator, pattern or combination guarantees a gain. French authorities point out that an AMF study covering 15,000 investors showed that 9 in 10 clients had lost money on Forex and/or CFDs, highly leveraged trading activities. Reading a chart is a useful skill; it is not a method for winning every time.

A concrete example

Let's imagine a daily candle on a BTC/USDT pair, with the following values (fictional figures):

Open: 60,000
High: 62,500
Low: 59,000
Close: 61,800

Reading:

The close (61,800) is above the open (60,000): the candle is green, the price gained 3% over the day.
The body measures $1,800 (from 60,000 to 61,800).
The upper wick runs from 61,800 to 62,500: the price went higher but didn't hold those levels at the close.
The lower wick runs from 60,000 to 59,000: at some point during the day, the price lost about 1.7% before climbing back.
You look at the volume: the day's bar is clearly taller than those of the previous ten days. So the rise came with stronger participation than usual.
You switch to log scale and a weekly view: the 62,000-63,000 zone corresponds to old highs. It's a possible resistance zone, not a certainty.

A reasonable conclusion: "the day was bullish, on high volume, and the price is approaching a zone that was rejected in the past." This is neither a buy signal nor a sell signal, but a description that helps you decide, for example, where to place a limit order or a stop if you already hold a position.

Checklist before drawing a conclusion

Which timeframe am I looking at, and has the candle closed?
Have I looked at a longer timeframe for context?
Is the scale linear or logarithmic?
Does volume confirm the move, compared with previous periods?
Are my supports and resistances drawn as zones?
Am I looking for signals that confirm what I already want to do?

Mistakes to avoid

Confusing description with prediction: a chart tells the past, it promises nothing.
Piling on indicators: stacking five indicators calculated from the same prices doesn't add information, it adds confusion.
Reacting to an unclosed candle: the final shape can be very different.
Drawing conclusions from one minute: small timeframes are dominated by noise.
Ignoring the scale: a long chart on a linear scale distorts how past moves look.
Believing in "foolproof methods" sold on social media: if a setup won every time, it would quickly stop working.

Key takeaways

A candle summarizes a period in four prices (open, high, low, close); its color shows whether the price rose or fell over that period.
The timeframe changes the reading: start from a long view, then zoom in, and wait for candles to close.
Volume shows the participation behind a move, but it is specific to each platform and can be artificially inflated.
Supports and resistances are price zones, not exact lines, and can give way at any time.
Use the logarithmic scale for long views; treat moving averages and the RSI as lagging descriptive tools, never as guarantees of profit.

Sources

Compare services related to this topic

Crypto exchange comparison