A price chart is a record of what people paid, plotted over time. That is all it is, and it is more useful than it sounds — but the gap between reading a chart and reading things into a chart is where a great deal of money goes.
This is a guide to the mechanical parts: what the marks mean, which settings change the picture, and which common readings are not supported by what is actually on screen.
Line, candle, and what each hides
A line chart connects closing prices. It is clean and good for seeing a trend over months, and it discards everything that happened between closes. An asset that traded from $100 to $60 and back to $99 in one day shows as a flat line.
A candlestick chart shows four numbers per period. The body spans the open and the close — coloured one way if it closed higher, another if lower — and the thin wicks above and below mark the highest and lowest prices reached. One candle therefore carries the range, the direction, and where within that range the period settled.
The wicks are the part people skip and the part that carries information. A candle with a long lower wick and a close near the top means the price fell substantially during the period and buyers pushed it back up. A candle with a long upper wick means the opposite. Two candles can have identical opens and closes while describing completely different sessions.
Timeframe changes the conclusion
Every chart has a period per candle, and this single setting does more to shape an impression than anything else on screen.
The same asset can be in a clear uptrend on a weekly chart, flat on a daily, and falling sharply on a five-minute. All three are true. None contradicts the others. They describe different questions.
Two practical consequences follow. First, decide which timeframe matches your actual horizon before looking, because looking first and choosing after guarantees you find what you already believed. Someone holding for years has no business making decisions from a fifteen-minute chart. Second, be sceptical of any chart presented without its timeframe visible, particularly in screenshots — cropping the axis is the oldest way to make a chart say something.
Linear and logarithmic scales
On a linear scale, equal vertical distance means equal dollar movement. On a logarithmic scale, equal vertical distance means equal percentage movement.
For assets that have moved across orders of magnitude — which describes most cryptocurrencies over multi-year periods — linear scaling is actively misleading. A rise from $1 to $2 and a rise from $10,000 to $20,000 are both a doubling, and both matter equally to a holder. On a linear chart the first is invisible and the second dominates the entire picture.
Any chart spanning years should be viewed logarithmically. Any chart spanning days is fine either way. Most charting tools have the toggle in a corner and most people never touch it.
Volume belongs on the chart
Volume bars along the bottom show how much traded in each period, and they are the check on whether a price move meant anything.
A price rise on high volume represents many participants agreeing. The same rise on very low volume may represent a handful of trades in a thin book, and it reverses just as easily. Sharp moves on negligible volume are frequently noise, and they are the moves most likely to be screenshotted and shared.
Volume also gives context to a fall. A decline on unusually heavy volume suggests genuine distribution; the same decline on light volume during a quiet period may be nothing more than an absence of buyers.
What support and resistance actually are
These terms appear constantly and are worth defining honestly.
Support is a price level where buying has previously been sufficient to stop a decline. Resistance is a level where selling has previously stopped an advance.
The reason they sometimes work is behavioural rather than mystical: people remember prices. Someone who wanted to buy at $30 and watched it run to $45 often still wants to buy at $30. Someone who bought at $45 and watched it fall frequently sells at breakeven if it returns. Enough participants remembering the same number produces real order flow around it, and round numbers matter for the same reason.
The reason to be careful is that these levels are drawn by hand, after the fact, and any chart offers several plausible lines. A level identified in advance and respected repeatedly is evidence. A level drawn once the price has already reversed is a description of the past wearing the costume of a prediction.
Indicators, briefly and sceptically
Moving averages plot the average price over a trailing window, smoothing noise to show direction. The 50-day and 200-day are widely watched, which is a large part of why they matter — enough participants act on them to create real flow. They are lagging by construction: an average of past prices cannot tell you about the future, only describe the recent past more legibly.
RSI measures the magnitude of recent gains against recent losses on a 0–100 scale, with conventional thresholds at 70 and 30. The word "overbought" is where people get into trouble. It does not mean a fall is due. Assets in strong trends stay above 70 for weeks, and traders who shorted every overbought reading in a bull market lost money continuously while being technically correct about the indicator.
MACD, Bollinger Bands and the rest are all transformations of price and volume. They repackage information already on the chart into a form that is easier to see. None adds data that was not there.
The honest summary is that indicators help with attention — they make patterns visible that the eye misses — and that no combination of them predicts price. The academic literature on technical analysis is not kind to the stronger claims, and crypto has produced no exception.
Reading crypto charts specifically
A few things differ from traditional markets and are worth knowing.
There is no close. Crypto trades continuously, so a "daily candle" closes at whatever hour the data provider chose, usually UTC midnight. Candlestick patterns built around meaningful market closes carry less weight when the close is arbitrary.
Short histories. Most assets have existed for a few years, and many have never traded through a full economic cycle or a sustained bear market. Patterns identified across two years of data are a much weaker basis than patterns across decades of equity history.
Correlation is high. Most cryptocurrencies move with Bitcoin most of the time. A chart of a small token frequently shows the market's movement rather than anything about that token. Checking Bitcoin's chart alongside it tells you which you are looking at.
Data differs between sources. Because there is no single exchange, charts assembled from different venue sets will differ slightly, and more than slightly for thinly traded assets.
Weekends are real trading days. Volume is typically lighter, which makes prices easier to move, and sharp weekend moves are a recurring feature for that reason.
How to actually use one
Start wide. Look at a multi-year logarithmic chart to establish where the current price sits in the asset's history. Something up ninety percent this month may still be down eighty percent from where it traded two years ago, and that context changes how the recent move reads.
Then narrow to your horizon and check volume against the moves you find interesting.
Then stop, because the chart cannot tell you the rest. It shows what happened, and what happened is a function of things not on the chart — an unlock schedule, a protocol upgrade, an exchange listing, a regulatory decision, or a macroeconomic move that dragged the whole asset class. The chart records the consequence. Understanding it means looking somewhere other than the chart.
Coinvilo provides price history charts across multiple timeframes on every coin page, alongside market cap, volume and supply data. This article is educational and is not financial, investment or tax advice. Past price movement does not indicate future performance.