How to read a price chart

A price chart is a record of agreement: for every moment it shows the price at which buyers and sellers actually transacted. Everything else people read into a chart is an inference from that record, and the difference between the record and the inference is most of what there is to know.

Read plainly, a chart answers three questions: what the price did, how quickly, and how much disagreement there was on the way. Read as prophecy, it answers nothing, which is where most chart-based trading goes wrong.

Quick answer

The horizontal axis is time and the vertical axis is price. Each bar or candle summarises a period with four prices: open, high, low and close. The body shows the open and close; the wicks show the high and the low. A long wick means price went there and came back, which is a fact about disagreement rather than a signal.

What the four prices tell you

• Open. Where the period started. Interesting mainly in relation to the close of the previous one, because the gap between them is what happened while you could not trade.
• Close. Where the period ended. The most-referenced of the four because it is the price that survived until the end of the interval, and intervals are an arbitrary convention rather than a property of the market.
• High and low. The extremes reached. A high far from the close means price was there and was rejected, which is information about the balance of buyers and sellers at that level.

Volume, and what it is actually saying

Volume is the amount traded in the period. It does not measure conviction directly, and the common reading — that a move on high volume is more meaningful — is a reasonable inference rather than a rule. What volume does establish is whether a price was reachable: a level where almost nothing traded is a level the market has not really tested.

This matters for the practical question of whether a price you can see is a price you could have got. A chart showing a spike on negligible volume is showing a price that existed for an instant and may not have been available to anyone.

The words that describe shape, and the trap in each

Trend. Higher highs and higher lows. Easy to see in hindsight and genuinely ambiguous in real time, because the most recent high is only a high once the price has fallen from it.

Support and resistance. Prices where the market previously reversed. They are descriptive rather than predictive: the level marks where sellers or buyers were before, and there is no mechanism that requires them to be there again.

Breakout. A price moving beyond a level it had respected. Whether it continues is the question, and it is a question about what happens next, not about the chart. Breakouts fail often enough that the word describes an event rather than a signal.

What a chart cannot show you

It cannot show who was trading or why. It cannot distinguish a large participant acting deliberately from many small ones agreeing by accident. It cannot show the news that caused a move, only the move. And it cannot show positions that were never filled.

This is why the honest use of a chart is to describe what happened and to structure a decision about what you would do in each case — not to predict. The distinction is between a chart as a map of the past and a chart as a claim about the future, and only the first is something the data supports.

Reading a chart for the purpose of practising decisions is covered in why practise before you trade, and the sizing arithmetic in risk and position size.

Timeframe, and why the same market looks different

A daily chart shows the outcome of the day; a five-minute chart shows every argument inside it. Neither is more honest, and the choice determines what you can conclude. Decisions that need to survive a week are usually better made on a chart that does not show every argument.

Where people go wrong is switching interval to find a timeframe that agrees with a decision they already want. If the daily chart says no and the hourly says yes, that is not confirmation; it is two different questions.

Levels are prices where something happened

A level marks a price at which the market previously reversed in a visible way. It is a fact about the past. Treating it as support for a decision is a hypothesis, and the honest version is conditional: if the price reaches this level and behaves like this, I will do this.

Written that way, the chart becomes a plan with triggers rather than a prediction. That is the version that can be practised, recorded and assessed, which is what makes it useful.