Hi,
I always get stuck with icon sets, I am trying to do the following:

if 'Due Date' (A) is greater than 'Achieved' (B) then (B) has 'black circle' and
if 'Due Date' (A) is less than or equal to 'Achieved' (B) then (B) has 'green circle'

A B
15/01/14 02/02/14

thanks