Average True Range
Average True Range is an indicator that takes a moving average of Welles Wilder's True Range calculation. Often used as a market volatility measurement. See True Range.
Below is a bar chart of the SPDR S&P 500 ETF, or SPY, with a 14-period Average True Range indicator in the lower pane.
Notice how the ATR indicator rises, increasing in value as the volatility of the SPY increases during the downtrend in March.
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