Series.Paste (Word)

Pastes a picture from the Clipboard as the marker on the selected series.

You can use this method on column, bar, line, or radar charts, and it sets the MarkerStyle property to xlMarkerStylePicture.

With ActiveDocument.InlineShapes(1) 
 If .HasChart Then 
 .Chart.SeriesCollection(1).Paste 
 End If 
End With