MQL5 ReferenceStandard LibraryCustom GraphicsCPieChartValueDelete CreateSeriesSetValueAddValueInsertValueUpdateValueDeleteDrawChartDrawPieLabelMake ValueDelete Removes a value from the pie chart (at the specified position). bool ValueDelete( const uint pos, // index ) Parameters pos [in] Index of the value — the serial number of its addition, starting with 0. Return Value true if successful, otherwise — false. ValueUpdate DrawChart