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The Period and PeriodValue properties define the period for a function, i.e., over what time span or value range should the function be called. The Period divides the SourceChart values collection into chunks (usually based on a time span) and calls the FunctionType for every chunk.

The PeriodValue may be a percentage (between 0 and 1) or an Index Range. For example, call the function for 25% (PeriodValue=0.25;Period=cfpPercentageCount) of the SourceChart values, or call the function for every 5 (PeriodValue=5;Period=cfpIndexRange) SourceChart values.

Namespace: RSChartFunction



  property PeriodValue: TRSChartValueType read FPeriodValue write SetPeriodValue;

Property Value

Type: TRSChartValueType


PeriodValue is only used for cftIndexRange, cftTimeRange, cftPercentageCount, and cftPercentage Periods.


The following code divides up the SourceChart values into increments of 2 hours and 30 seconds each:


RSChartFunction1.PeriodValue := EncodeTime(2,30,0,0);
 RSChartFunction1.Period := cfpTimeRange;

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