Right I've finally got the painting of the line points correctly plotting after fighting to no end with the chart... However there is still one thing that is perplexing to me... WHY are the points not being painted the same colour as the series shown in the legend - IMO this is a bug in the control set as I have been unable to ascertain how to actually get them to be painted the correct colour. Any ideas anyone? Having black dots all over the chart when the legend shows the correct series looks very unprofessional.