AVERAGE TRUE RANGE - ATR

It was introduced in Welles Wilder’s book: New Concepts in Technical Trading Systems as a volatility measure.

An indicator of true range is greatest of the following:

  • The absolute value of the previous close deducted from the current high.
  • The absolute value of the previous close deducted from the current low.
  • Current low deducted from the current high.

It is a moving average, commonly 14-days, of the true ranges.