This indicator represents an implementation of the Parkinson's historical volatility of a financial asset. It is very similar to the Average True Range technical indicator.
This indicator was first implemented in MQL4 and published in Code Base at mql4.com 23.09.2010.
Fig.1 The ParkinsonHistVolatility Indicator
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1060
This indicator calculates the classic historical volatility of a financial asset.CCI_DrawMode
Implementation of the option to change the drawing mode, as exemplified by the CCI indicator.