Trendlines collection (Excel Graph)

A collection of all the Trendline objects for the specified series. Each Trendline object represents a trendline in a chart. A trendline shows the trend, or direction, of data in a series.

Remarks

Use the Trendlines method to return the Trendlines collection.

Use the Add method to create a new trendline and add it to the series.

Use Trendlines (index), where index is the trendline's index number, to return a single TrendLine object.

The index number denotes the order in which the trendlines are added to the series. Trendlines(1) is the first trendline added to the series, and Trendlines(Trendlines.Count) is the last one added.

Example

The following example displays the number of trendlines for series one in the chart.

MsgBox myChart.SeriesCollection(1).Trendlines.Count

The following example adds a linear trendline to series one in the chart.

With myChart.SeriesCollection(1).Trendlines 
 .Add Type:=xlLinear, Name:="Linear Trend" 
End With

The following example changes the trendline type for series one in the chart. If the series has no trendline, this example fails.

myChart.SeriesCollection(1).Trendlines(1).Type = xlMovingAvg

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