BTN AF

Overview

BTN AF (Button Aggression Factor) is a position-specific poker statistic used primarily in tracking software like PokerTracker or Hold'em Manager. It quantifies how aggressively a player plays from the button (dealer position) by comparing aggressive actions (bets and raises) to passive actions (calls). The formula is:

AF = (Bet + Raise) / Call

For BTN AF, only hands where the player is on the button are considered.

Calculation and Interpretation

• High BTN AF (e.g., >3): The player frequently bets or raises rather than calling on the button. This often indicates a player who values position and uses it to apply pressure, possibly with a wide range.
• Low BTN AF (e.g., <1): The player calls more often than they bet or raise on the button. This can suggest a passive or trappy style, or a player who only bets/raises with strong holdings.
• Typical range: Many consistent winners have a BTN AF around 2.0 to 4.0. However, context matters (e.g., heads-up vs. multi-way pots, stack depths).

Why BTN AF Matters

The button is the most profitable position in poker due to acting last post-flop. A player's aggression level on the button reveals how they exploit that advantage:

• High AF suggests the player is aware of positional leverage and often bets for value or as a bluff.
• Low AF might indicate missed opportunities or a preference for pot control. Such players may be exploitable by raising their limps or betting into their checks.

Usage in HUDs

BTN AF is typically displayed as a secondary stat alongside VPIP (Voluntarily Put Money In Pot) and PFR (Preflop Raise) for the button. For example, a HUD might show "BTN VPIP/PFR/AF: 25/20/3.0". Comparing BTN AF to overall AF can reveal positional tendencies.

Limitations

• AF does not distinguish between bet and raise sizes; a min-raise counts the same as an all-in raise.
• It ignores checking (which is a neutral action). A player who checks often but bets rarely may still have a high AF if they never call.
• Small sample sizes can distort the stat; it becomes reliable after several hundred hands on the button.

Related Concepts

• Aggression Frequency (Agg%): Alternative metric that includes checking as a passive action, giving a percentage of aggressive actions (bet/raise) out of all non-fold actions.
• Positional Stats: BTN PFR, BTN VPIP, SB/BB stats for similar analysis.

In summary, BTN AF is a focused tool for analyzing a player's post-flop aggression from the most advantageous seat, helping to identify exploitable patterns.