ITChart.SeriesCount
ITChart

property SeriesCount: Integer;

Type Library
TeeChartx

Description
This is the number of Series (Active or not) a Chart has.

SeriesCount Example

Delphi

for t := 0 to TChart1.SeriesCount - 1 do

TChart1.Series[ t ].Color := clRed ;

Visual Basic

For t = 0 To TChart1.SeriesCount - 1

TChart1.Series(t).Color = vbRed

Next t