Currently RadChart can process data that is in the range of decimal. This is done to improve precision, as arithmetic operations done in decimal are more precise than those done in double. Our developers investigated this limitation and concluded that more serious changes have to be made to the control internal mechanisms. These changes can reduce the precision when working with small numbers. So, I am afraid these changes have been dropped of our schedule and currently their status is undefined. We will reconsider them again when discussing our plans for the next quarter.
the Telerik team
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