Average True Range

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Average True Range

In technical analysis, a measure of a security's volatility. It is calculated using one of three metrics: the current high less the current low, the current high less the previous close, and the current low less the previous close. The ATR is the highest of those metrics at any given time. A higher ATR indicates greater volatility. In order to have the most accurate measure possible, one generally uses a 14-day exponential moving average of the ATR.