atr

Parameters

Average True Range - atr(periods, matype="wilder")

Volatility indicator measuring average range of price movement. The true range

captures the full range of price movement including gaps.

• periods (int): Number of periods (commonly 14)
• matype (str, optional): Smoothing type ["wilder", "sma", "ema"], default "wilder"

Formula

True Range = MAX(high - low, |high - prev_close|, |low - prev_close|)
ATR = MA(True Range, periods)

Examples

// bar range exceeded ATR
(high - low) > atr(14);

/* range exceeded to the downside; simple moving aveage smoothing for true range calc */
low < open - atr(14, matype="sma");

/* atr higher (expanded volatility) than 5 bars ago */
myatr = atr(14, matype="sma");
myatr > myatr[5];

/* strong move exceeds 2x ATR */
close > close[1] + 2 * atr(14);

Returns

Float value representing the average true range (always positive)