HJ Fold to 4-Bet

Overview

HJ Fold to 4-Bet is a HUD (Heads-Up Display) statistic that tracks the frequency with which a player in the Hijack (HJ) position folds to a 4-bet after they have 3-bet. This stat is important for understanding a player's aggression and response to re-raises, particularly in late-position scenarios.

How It Is Calculated

The stat is calculated as: (Number of times HJ folded to a 4-bet after 3-betting) / (Total number of times HJ faced a 4-bet after 3-betting). Only hands where HJ made the initial 3-bet and then faced a 4-bet are counted. Limp situations or calls are excluded.

Typical Values and Interpretation

• Low (e.g., below 30%): The player is unlikely to fold to a 4-bet, meaning they often call or 5-bet. This suggests a strong range or a stubborn player. Opponents may be less inclined to 4-bet light against them.
• Moderate (30–50%): Average or balanced play. The player folds roughly as often as GTO suggests, depending on stack sizes and positions.
• High (above 50%): The player folds too often to 4-bets, making them exploitable. Aggressive opponents can profit by 4-betting a wider range, knowing HJ will frequently surrender the pot.

Strategic Implications

• For the HJ player: A high fold-to-4-bet can be exploited. To adjust, HJ should either tighten their 3-betting range (so they are stronger when called) or fight back more often by calling or 5-betting. The correct approach depends on opponent tendencies and stack depths.
• Facing the HJ player: If an opponent's HJ Fold to 4-Bet is high, you can 4-bet with a wider range, including some bluffs, to pressure them. If it is low, avoid bluff 4-bets and instead value-bet or call with strong hands.

Sample Size Considerations

This stat is often based on a small number of occurrences (few players face many 4-bets after 3-betting). A minimum of 10–20 opportunities is recommended before drawing conclusions. For example, if HJ has faced only 5 4-bets and folded 4 times (80%), the sample is too small to be reliable. Always combine this stat with other data like overall aggression, position, and stack sizes.

Relationship to Other Stats

• HJ Fold to 3-Bet: Measures response to a 3-bet when HJ opened. High fold to 3-bet plus low fold to 4-bet might indicate a player who only 3-bets premium hands but hates to fold after putting in more money.
• HJ 3-Bet %: How often HJ 3-bets. A high 3-bet % paired with high fold to 4-bet suggests HJ 3-bets many hands but folds frequently to resistance – a common trait of light 3-bettors.

Conclusion

HJ Fold to 4-Bet is a niche but revealing stat for understanding how a player reacts to maximum aggression in late position. It helps in constructing adaptive ranges and exploiting opponents' tendencies in 3-bet/4-bet battles.