MQL5 ReferenceStandard LibraryCustom GraphicsCLineChartCalcArea FilledCreateSeriesAddSeriesInsertSeriesUpdateSeriesDeleteValueUpdateDrawChartDrawDataCalcArea CalcArea Calculates the area under the curve defined by the data series. double CalcArea( const uint index, // index ) Parameters index [in] Index of the series — the serial number of its addition, starting with 0. Return Value Area of the figure limited by the curve which is defined by the data series. DrawData CPieChart