Provide the option to let piecharts show the larger segments on top
Reading a pie chart is like reading a clock. It's most effective to place the largest segment at 12 o'clock (as it does now). The best way to order the rest of the segments is to place the second biggest slice at 12 o'clock on the left; the rest would follow counterclockwise.
Thanks for your suggestion. For now, you can just sort your data by value before adding it to the chart.
Just sort your data accordingly...
Though a bar chart is better for such a display anyway.