AF from UTG

Overview

AF from UTG (Aggression Factor from Under the Gun) is a specific HUD (Heads-Up Display) statistic used in online poker tracking software. It refines the general Aggression Factor by filtering actions solely from the UTG position—the seat immediately to the left of the big blind, which acts first pre-flop in a full-ring game.

Calculation

Aggression Factor is calculated as:

AF = (Total Bets + Total Raises) / Total Calls

Only actions made from UTG are considered for this variant. For example, if a player from UTG has made 10 bets/raises and 5 calls, their AF from UTG is 2.0. A higher number indicates a more aggressive style (more raising/calling), while a lower number suggests a more passive approach (more calling than raising).

Positional Significance

UTG is the most disadvantageous position pre-flop because the player must act without knowledge of others' intentions. Consequently, standard poker strategy dictates a tight range from UTG—typically only premium hands like high pairs (AA, KK, QQ) and strong suited connectors. A player’s AF from UTG reveals how they deviate from this baseline:

• Low AF (< 1.0): The player rarely raises from UTG, often limping or calling. This can indicate passive play or a trappy style with strong hands.
• Medium AF (1.0–2.5): The player mixes raises and calls, likely playing a standard tight UTG range with occasional speculative calls.
• High AF (> 2.5): The player raises frequently from UTG, suggesting either an aggressive, wide range or a consistent strategy of raising premium hands and folding others. Sustained high AF may indicate predictability.

Strategic Interpretation

While interpreting AF from UTG, sample size is crucial. A player with only 10 UTG hands may have a misleading AF due to variance. Also, AF does not distinguish between bet and raise sizes—a min-raise counts the same as a large bet. Therefore, combine AF with other stats like VPIP (Voluntarily Put Money In Pot) and PFR (Pre-Flop Raise) from UTG for a fuller picture.

Example Scenarios (hypothetical):

• Tight-Aggressive (TAG): VPIP from UTG ~10%, PFR ~8%, AF from UTG ~2.0. This player raises most premium hands and folds marginal ones.
• Loose-Aggressive (LAG): VPIP from UTG ~15%, PFR ~12%, AF from UTG ~3.5. This player uses aggression to compensate for positional disadvantage, but a high AF may indicate over-reliance on raising.
• Tight-Passive: VPIP ~8%, PFR ~4%, AF from UTG ~0.7. This player limps or calls frequently, possibly with weak holdings.

Limitations

• AF from UTG ignores post-flop actions, so a player who often check-folds after raising UTG may still have a high AF.
• It does not account for table dynamics, such as antes or stack sizes.
• Against certain opponents, a low AF from UTG might be a deliberate exploitative adjustment.

Despite these limitations, AF from UTG remains a valuable stat for profiling opponents and adjusting one's own UTG strategy.