Hello Dirk,
In Nevron Chart for SSRS you can use Custom Data Point Appearance. Take a look at the following help documentation topic: http://helpssrsvision.nevron.com/#Values_Data_Groupings_-_Appearance.html

You can also review the example ChartTypes_BoxAndWhiskers.rdl shipped with the installation.

Let us know if you meet any problems.

Best Regards,
Nevron Support Team

I have a line chart with subtype XY Scatter. I'm trying to color my values based on a condition similar to this link to sharepoint: http://helpsharepointvision.nevron.com/#Values%20Data%20Groupings%20-%20Appearance.html

However, the chart ignores my values and keeps using the style sheet values. Is this because of the chart type or am I doing something wrong?