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Candlestick charts: what a single candle shows

From open to close. A visual guide to how a candle is built and how the chart is labelled.

SignalAI Editorial Team1 min read
Illustration: candles on a chart, with one large rising candle and dotted lines at its open and close
Illustration for this article

A candlestick chart compresses a period's data into a single shape. Let's take its parts apart on a diagram where every mark has its own label.

The body and shadows of a candle

A candle shows how the price moved over the selected period. Its body connects the opening and closing prices, and the thin lines, called shadows, mark the high and low of that period.

Open and close

In the diagram below, the close is higher than the open. Colour helps you tell the direction of the change, but exact values have to be read from the chart's scale and labels.

The structure of a candle whose close is above its open. The upper shadow marks the high, the top of the body is the close, the bottom of the body is the open, and the lower shadow marks the low.
A schematic candle: 1 is the high, 2 the close, 3 the open, 4 the low and 5 the body of the candle. The scale and values are illustrative.

The period matters

One candle corresponds to one interval of the selected timeframe. After you change the timeframe, the same market events are grouped into different candles.

Read the chart first

Check the asset name, the candle period and the price scale. The shape of a single candle describes data that is already on the chart and does not by itself guarantee the next price move.

SignalAI Editorial Team · · Updated

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