How do you use AF on your HUD?

I'd love some input from other CC members who use Aggression Frequency on their HUDs.

I'm interested specifically in terms of cash games. A lot of example HUDs include AF as a stat and I've never found it very useful.

If you have it on your HUD, how do you use it? What does it really tell you about the other player? I assume you need a lot of hands on an opponent before this stat converges, but even then, what does it give you that other stats don't?

It's a post-flop aggression stat. It's a very useful stat (though some prefer AFq or AF%) that tells you a player's tendency to be passive (check/call/fold) or aggressive (bet/raise) post-flop. As with all stats, the bigger the sample the more accurate it tends to be, but it doesn't need a lot of hands to become significant compared to something like F3Bet.

not a stat i can honestly say i have ever used, i tend to look at stuff street by street

duggs said:

not a stat i can honestly say i have ever used, i tend to look at stuff street by street

Click to expand...

Of course that's the most precise way to do it, and now with the modern HUDs it's not hard to do, but I'm still old school and find the aggregate stat useful. Although I slightly prefer AFq because AF doesn't take folds into consideration as a passive action.

Aggression Factor (AF) = (Bets + Raises) / Calls
(checking/folding doesn't affect it)

This results in a value between 0 and INF (infinite)
If a player never calls, but always bets/raises, his AF will be infinite.

Both Aggression Factor and Aggression Percentage are only used in postflop decision making. It will tell you the likelihood the opponent will bet on each street. Harrington, in Harrington on Online Cashgames favors using the AF stats for each street separately in the HUD. (not relying on the 'overall' postflop AF stat)


Look at it this way: AF

<1.0: player DOES NOT bluff. He only VALUE BETS, he only CBETS when he has HIT, he only RAISES when he has hit the board (or has an overpair), etc.
1.5-2.5 Player will often CBET even when he's missed the flop, or will occasionally bet a DRAW, but he won't do anything crazy
3+ Player will: always cbet, bet AND is even capable to raise his draws, occasionally donkbet, probe bet, double barrel, ABUSE his position, BLUFF when a scare-card hits, capable to BET a missed draw on the RIVER, etc. etc.