I am not quite sure what is the exact reason for the illustrated issue as with Kendo UI Q1 2013 (v2013.1.319) there is a screen boundary detection
for the Chart's tooltip. Could you please ensure all needed resources
are included? Also for your convenience here is a simple jsBin example
could you edit it and show me your current implementation? This way I would be able to advice you further and provide concrete recommendations. Thank you in advance for your cooperation.
the Telerik team
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