type TTChartOnSeriesBeforeAdd = procedure(ASender: TObject; SeriesIndex: Integer; Var MoreValues: WordBool) of object;
Type Library
TeeChartx
Description
Every Series component has an OnBeforeAdd event. This event is triggered whenever a new point is going to be Added or Inserted. You can delegate this event in your Form's code to, for example, control if new points will be really added to the Series. This event also happens when a Series component is connected to a Table or Query.