Market analysis

Average true range

Also calledATR · ATR

Average true range, or ATR, is a technical volatility indicator that averages each period’s true range over a chosen lookback. True range captures the largest of the high-to-low range, the high-to-prior-close gap, or the prior-close-to-low gap, so it includes price gaps.

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August 18, 2026

Average true range — definition, practical meaning, example, and common interpretation risk checked against the linked reference material

Definition checked

  • Definition and plain-English explanation for “Average true range”
  • The worked example and the distinction described in the watch-out note
  • Reference material: CRAN TTR documentation — True Range / Average True Range, Fidelity — ATP Charting Indicators

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  • Treat examples as explanations of mechanics, not as prices, forecasts, or trading advice

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What Average true range means

ATR estimates how much price has been moving per bar, expressed in the asset’s price units. It measures movement size, not whether price is rising or falling. A daily ATR of 0.0080 in EUR/USD means recent daily ranges have averaged about 80 pips under that calculation, not that the pair is expected to move exactly 80 pips tomorrow.

Average true range provides context for volatility across timeframes and instruments. Traders may use it to compare recent movement with a planned order distance or to normalize a chart study. ATR does not identify trend direction, predict the next range, or set an appropriate position size without considering account risk and contract value.

For one day, assume high is 1.1050, low is 1.0990, and the prior close is 1.1010. The three true-range candidates are 60, 40, and 20 pips, so true range is 60 pips. If a simplified 14-period ATR is 72 pips, that is the average recent true range, not a fixed daily limit.

Common questions

Does ATR show whether a market will rise or fall?+

No. ATR measures the scale of recent price movement without assigning a direction. A rising ATR can accompany either a sharp advance, a sharp decline, or wide two-way trading.

Why does ATR include the prior close?+

Including the prior close allows true range to capture a gap between one period’s close and the next period’s high or low. A simple high-minus-low range could miss that movement.

Go to the original material.

01CRAN TTR documentation — True Range / Average True Range02Fidelity — ATP Charting Indicators