Pokertracker - aggression factor useless?

[Supern]

I have found the aggresion factor quite useless for loose players.
They may have an extremely low aggresion factor due to calling alot.
But they may bet quite loose as well and bluff alot.

1. How do you determine if a bettor is a loose or a tight bettor?

2. How do you determine if a caller is a loose or a tight bettor?


My answers:
1. I guess the best way to go is the Bet/Raise/Ch-raised stat for each street. And notes of course if you have any.

2. The best use for the aggresion factor is to determine if a caller is a threat I think. Low aggression and loose player means he is calling with all kind of crap.