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Poker glossary

HUD (Heads-Up Display)

What it means

A HUD (Heads-Up Display) is software that tracks and displays statistical information about your opponents directly on your online poker table. These programs collect data from every hand you’ve played against each opponent and present key metrics like VPIP (voluntarily put money in pot), PFR (preflop raise percentage), and aggression frequency. The statistics appear as small boxes next to each player’s avatar, updating in real-time as you play more hands against them.

How it works at the table

When you open multiple tables on a poker site, your HUD automatically detects the game and overlays statistics for each seat. Say you’re playing 100bb deep at a 6-max table and face a 3bb raise from the cutoff. Your HUD shows this player has VPIP 28/PFR 22/3bet 8% over 1,200 hands. These numbers tell you they’re playing the top 28% of hands, raising with 22% of them, and 3-betting 8% of the time. You hold A♠ J♦ on the button. Against this somewhat loose but not overly aggressive opponent, you can confidently 3-bet to 9bb. Without the HUD data, you’d be guessing at their tendencies.

Strategic context

HUDs transformed online poker by making player ranges more transparent and exploitable. Professional grinders use them to identify patterns across thousands of hands that would be impossible to track manually. The software excels at revealing population tendencies - like how often players fold to 3-bets from different positions or their continuation betting frequencies on various board textures. This data advantage compounds over time, as players with larger databases can make more accurate adjustments against regulars they frequently encounter.

Common mistakes

Players often become HUD-dependent and forget to observe actual gameplay for timing tells and bet sizing patterns. They’ll make decisions based purely on long-term stats without considering recent dynamics or tilt factors. Another error is using default HUD configurations without customizing statistics for their specific games - a 6-max cash game requires different data points than a tournament. Many also misinterpret sample sizes, making major adjustments based on 50-hand samples when thousands are needed for statistical reliability.

Modern HUDs integrate with database software that enables deep population analysis and leak-finding in your own game. Understanding positional play becomes more nuanced when you can see exactly how opponents adjust their ranges by position. Some sites now restrict or ban HUD use entirely, pushing players back toward observation-based reads and GTO strategies that work against unknown opponents.