Hi Rhys,
Thank you for contacting us.
I gave the bar charts a check and it seems that the tooltip is being displayed correctly.
Would you send me the relevant xaml and code behind to check it out.
From the screenshot I can deduct that tooltips are not shown on negative bars, is that correct?
Sincerely yours,
Evgeni "Zammy" Petrov
the Telerik team
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