TChartSeries.FirstValueIndex
TChartSeries
property FirstValueIndex: Integer;
Unit
TeEngine
Description
This function / property returns the ValueIndex of the First point in the Series that has an X value which is between the Horizontal Axis Maximum and Minimum values.
When no Zoom is applied to the Chart, and the Axis are Automatic, the FirstValueIndex is 0. If the Series has no points or there are no visible points, the FirstValueIndex returns -1.