Trendlines Method [Excel 2003 VBA Language Reference]

Returns an object that represents a single trendline (a Trendline object) or a collection of all the trendlines (a Trendlines collection) for the series.

object**.Trendlines(Index)**

object Required. The Series object.

Index   Optional Variant. The name or number of the trendline.

Example

This example adds a linear trendline to series one in Chart1.

Charts("Chart1").SeriesCollection(1).Trendlines.Add Type:=xlLinear

Applies to | Series Object