TTChartOnCompressFunctionGetDate

type TTChartOnCompressFunctionGetDate = procedure(ASender: TObject; FunctionSeriesIndex, SourceSeriesIndex, ValueIndex: Integer; Var D: TDateTime) of object;

Type Library
TeeChartx

Description
Event called by the compression function to give the application the opportunity to supply custom date values, instead of using the default date values from the OHLC source series.