Intercept Property
Returns or sets the point where the trendline crosses the value axis. Read/write Double.
For information about using the Intercept worksheet function in Visual Basic, see Using Worksheet Functions in Visual Basic.
Remarks
Setting this property sets the InterceptIsAuto property to False.
Example
This example sets trendline one in Chart1 to cross the value axis at 5. The example should be run on a 2-D column chart that contains a single series with a trendline.
Charts("Chart1").SeriesCollection(1).Trendlines(1).Intercept = 5