Would it be possible for me to have a List of :

datetime
double[]

So in my list, each object contains a date and a list of points which all share the same datetime.

Or do I have to copy the datetime to each points and separate them completly?

Thanks
Dom

Hi Dom,

For the purpose you should create new class where the first property is of type DateTime and the second one - an array of doubles. Then you can bind the Chart by following our help topic Nested Collections which are described here.
As another approach I can suggest is that you set your arrays of doubles as datasources per SeriesMapping. This way each of the Series will have independent datasource and they will share one and the same XValues. You can find an example with source code provided here. 

Kind regards,
Evgenia
the Telerik team