pie chart limit

[jimginn]

What is the practical limit of points when using a pie chart.

I notice that 20+ entries drops label of a top slice. The slice is there and referenced onHover however, not labeled ?

See this example –

http://bankdeposits.com/pie.php?bzip=42101,42045,42091&wh=cou

I’m not concerned with 20+ points however this label is on the 7th slice ….

There are 21 data points in this chart

Thanks in advance!