Two years ago I answered a similar question. It's not possible to do
within the normal Excel charting framework, but you can fake it by
drawing a polygon on the chart. The post provides a VBA technique for
doing so:
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.