Generally there is no hardcoded series count limit and it is dependent on your specific hardware configuration (e.g. we were able to visualize 500-800 series with single data point on a quad-core machine with 8GB RAM). Also, there are no settings that can prevent you from setting too many series but generally if your scenario will require such enormous amount of series, we would suggest you to use our new lightweight RadChartView
control that addresses some of the limitations and shortcomings of RadChart (especially performance-wise) and should have a higher series threshold limit. You can find more information on the differences between RadChart and RadChartView here
Hope this helps.
the Telerik team
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