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Sunday, November 2, 2025
Knowledge BaseGlossary

Glossary

Algorithmic Trading can be a complex subject. Keep your knowledge current with this glossary of key concepts, terminology, and technical indicators.

Average True Range - ATR


DEFINITION

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.

EXPLANATION 

Wilder originally developed the ATR for commodities but the indicator can also be used for stocks and indexes. Simply put, a stock experiencing a high level of volatility will have a higher ATR, and a low volatility stock will have a lower ATR.



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