AF from HJ
AF from HJ
AF from HJ is the aggression factor (ratio of bets and raises to calls) observed from a player in the hijack position in post-flop play.
Overview
AF (Aggression Factor) is a poker statistic commonly displayed in HUDs (heads-up displays) to measure a player's betting aggression. It is calculated as (Bets + Raises) / Calls, typically for post-flop streets (flop, turn, river) or individually per street. AF from HJ refers specifically to this statistic when observing a player in the hijack position (the seat two to the right of the button, also known as UTG+2 in full-ring games).
Interpreting AF from HJ
A high AF (e.g., >3.0) indicates that the player in the hijack tends to bet or raise more often than they call, suggesting an aggressive, possibly error-prone style. A low AF (e.g., <1.5) suggests a passive style, with many calls and few raises, often indicating a calling station or a player who slow-plays strong hands. Neutral values (1.5–3.0) may reflect balanced play.
Example
A hijack player with AF = 4.5 from 100 hands has made 45 bets+raises and only 10 calls post-flop, implying very aggressive betting; you might exploit this by trapping with strong hands or calling down lighter if they bluff too much.
Positional Context
The hijack is a middle/late position with moderate positional disadvantage relative to the cutoff and button. Players often have a wider opening range from the hijack, so AF from HJ can vary based on opponent hand strength and board texture. However, sample size matters; AF becomes more reliable after several hundred hands.
Limitations
- AF does not consider bet sizing or fold frequencies.
- It aggregates all post-flop actions, so a high AF could reflect many check-raises (aggressive) or many bluffs (also aggressive).
- Without a sample, AF from HJ is meaningless; a single hand with one bet and no calls yields infinite AF.
- AF is often used alongside other stats like VPIP (Voluntary Put $ In Pot) and PFR (Pre-Flop Raise) to form a complete profile.
Conclusion
AF from HJ provides a quick indicator of a player's post-flop aggression from a specific position. When combined with hand history and other statistics, it helps in forming an exploitative strategy. Always consider sample size and opponent tendencies rather than relying on AF in isolation.