Yang Zhang extension of Garman Klass Volatility – indicator MetaTrader 5

Yang Zhang extension of Garman Klass Volatility - indicator for MetaTrader 5
Yang Zhang extension of Garman Klass Volatility as described in a document “Drift-Independent Volatility Estimation Based on High, Low, Open, and Close Prices” by Dennis Yang and Qiang Zhang Yang Zhang extension of Garman Klass Volatility – indicator MetaTrader 5