Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/7705
NRMA is the famous indicator by Konstantin Kopyrkin.Chaikin's Volatility - CHV
The volatility indicator by Chaikin accounts for the spread changes between the maximal and minimal prices. It defines the volatility value based on the range width between the maximum and minimum.