http://www.flopturnriver.com/pokerfo...ll-173396.html
This is a pretty vague example, so lets say you hold: Th5c
The flop is: 8hTc9d
and you know for a fact villain has {JJ+}
size of the pot: 160 (115+30+15)
size of bet: 115
pokerstove says:
Hand 0: 18.384% { Th5c }
Hand 1: 81.616% { JJ+ }
115/(160+115)=41%
41%>18.3% so the call is -EV