Average True Range Technical Indicator (ATR) is an indicator that shows volatility of the market. It was introduced by Welles Wilder in his book "New concepts in technical trading systems". This indicator has been used as a component of numerous other indicators and trading systems ever since.
Average True Range can often reach a high value at the bottom of the market after a sheer fall in prices occasioned by panic selling. Low indicator values often correspond with long periods of flat that can be observed on the market top and during consolidation. It can be intepreted according to same rules as other volatility indicators. Average True Range can be interpreted according to the same principles as other volatility indicators. The principle of forecasting based on this indicator can be worded the following way: the higher the value of the indicator, the higher the probability of a trend change; the lower the indicators value, the weaker the trends movement is.
True Range is the greatest of the following three values:
The indicator of Average True Range is a moving average of the true range.