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How to Read a Candlestick Chart

By The ChartSage Team · August 17, 2026

You open a chart and see hundreds of small coloured rectangles with lines poking out of them. Most guides jump straight to naming patterns. That is the wrong order — a pattern is only meaningful once you know what a single candle records.

What one candle encodes

A candle is a summary of one slice of time. Nothing more. Four prices, compressed into one shape:

Value	What it records
Open	The first traded price of the period
High	The highest price reached during the period
Low	The lowest price reached during the period
Close	The last traded price of the period

The period is whatever timeframe you selected. On a 1-hour chart, one candle is one hour. On a daily chart, one candle is a whole trading day. The candle does not change shape based on the instrument — a candle on a forex pair and a candle on a crypto pair are built from the same four numbers.

When someone describes a “big red candle”, they mean a period where the close finished well below the open. That is a fact about the past, recorded in a rectangle.

Body versus wick

The body is the thick part: the distance between open and close. The wick (also called the shadow or tail) is the thin line above and below: the distance price travelled beyond the body before coming back.

The distinction is the whole point of the candlestick format.

• A long body means the period ended far from where it started. Price moved and stayed moved.
• A long wick means price went somewhere and did not hold there. It was rejected — pushed back before the period closed.

Think of the body as the outcome and the wick as the argument. A candle with a two-pixel body and a huge upper wick is recording a period where buyers pushed price up, sellers pushed it all the way back, and the period ended roughly where it began. The chart is showing you a fight with no clear result.

A wick is evidence that a price level was tested and not accepted. A body is evidence that it was.

Why colour alone is not information

Green versus red only tells you whether the close was above or below the open. That is a single bit of information, and it is the least useful bit on the candle.

A green candle with a tiny body and long wicks on both sides describes indecision. A red candle with a long body and almost no wick describes a decisive period. The green one is not “better” than the red one — they are describing different things entirely.

Colour also depends on your chart settings. Change the theme and every candle flips. The geometry does not change, which tells you where the actual information lives.

Three structures worth recognising

You do not need thirty pattern names. Three recurring structures cover most of what beginners are trying to see:

1. A long lower wick at a level. Price dropped into an area, then closed back near the top of its range. The chart is recording that lower prices were tested and rejected within that period. It carries more weight when it happens at a level price has reacted to before — see support and resistance explained for how those levels form.

2. A small body after a long run. Several large candles in one direction, then a candle with a compressed body. Momentum that was one-sided has become two-sided. This describes a pause in the existing move, not a reversal.

3. An engulfing body. One candle’s body fully covers the previous candle’s body in the opposite direction. It records that the period completely undid the prior period’s move. It is more notable after an extended run than in the middle of a choppy range, where engulfing bodies appear constantly and mean very little.

Why a single candle is never a decision

Here is the part most tutorials skip. A candle describes what already happened inside a fixed window. It contains no information about the next window.

The same shape reads differently depending on where it appears. A long lower wick in the middle of a sideways range is noise — price is bouncing around inside its own boundaries. The identical shape at the bottom of a multi-week decline, at a level that has been tested three times, sits inside a very different structure.

Context is the chart around the candle: the trend, the level, the timeframe, and what happened before. Reading one candle in isolation is like reading one sentence from a book and describing the plot.

ChartSage reads the structure around a candle, not just the candle itself, and explains what it sees in plain language — including when the structure is unclear.

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Educational technical-analysis tool. Not financial advice. Does not guarantee any outcome or profit.