Hi Kevin Hendriks,
You can create a class that has 2 properties for X and Y and 1 property for the label. The position properties should describe the position at which you want your chart to be drawn and in the label property you can add the text that should be displayed.
Let me give an example using your data:
You can set the X, Y and Label properties to this values
X Y Label
1 | 10 "1 | 10"
2 | 20 "2 | 10"
3 | 25 "3 | 5"
4 | 40 "4 | 15"
To display the proper text in the tooltip you can create a custom format for it and set it on your series definition like this:
ItemToolTipFormat="Now showing #DATAITEM.<<MyLabelProperty>>" />
You can find more information on format expressions in this
topic in our help system.
Hope this helps!
the Telerik team
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