Average True Range (ATR)

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A measure of volatility introduced by Welles Wilder in his book: New Concepts in Technical Trading Systems.

The True Range indicator is the greatest of the following:

-current high less the current low.

-the absolute value of the current high less the previous close.

-the absolute value of the current low less the previous close.

The Average True Range is a moving average (generally 14-days) of the True Ranges.

... Courtesy of Investopedia

The original Wilder formula for an exponential moving average with a smoothing constant (k = 1/ Period) is used to calculate the ATR.

ATR(int period)

ATR(ISeries<double> input, int period)

Returns default value

ATR(int period)[int barsAgo]

ATR(ISeries<double> input, int period)[int barsAgo]

double; Accessing this method via an index value [int barsAgo] returns the indicator value of the referenced bar.

input |
Indicator source data (?) |

period |
Number of bars used in the calculation |

// Prints the current value of a 20 period ATR using default price type |

You can view this indicator method source code by selecting the menu New > NinjaScript Editor > Indicators within the NinjaTrader Control Center window.