Term Question

When someone is refering to another player in the hand and uses 55/1.2/0 what is that refering to. Is ther a chart or past articles on this subject?
Thanks [img]/images/graemlins/blush.gif[/img]

[Forbillz]

Pokertracker is a software that keeps stats on hands you play, and your opponents play. It means:

55 = % of hands where money voluntarily goes into pot
1.2 = Pre-flop raise %
0 = Aggression factor after flop

Thanks...
how is the agression factor after the flop calculated, is it in a percentage form???

And are those stats displayed in pokertracker? If so, then where? I'm a bit new to the software.