AP Glossary
WhatIsSession?
A single play period on one machine. AP sessions are typically short — play only while the machine is +EV, then leave. Long sessions grinding through -EV territory is gambling, not advantage play.
Why It Matters
Why this matters for advantage play
Session length is one of the cleanest separators between AP and gambling. Disciplined APs sit down at +EV, play through the trigger, and leave. Anyone running long sessions on the same machine is donating expected value back to the house.
Session Strategy GuideCross-Reference
Related terms
Session Bankroll
The amount allocated for a single playing session, separate from total bankroll. Session bankroll limits protect the overall bankroll from a single bad variance run.
Walk / Walk Away
The discipline of leaving a machine or a casino when conditions are not favorable. Walking away from -EV situations — even when you're 'due' for a win — is the single most important habit in advantage play.
Advantage Play (AP)
The practice of using math, observation, and legal strategies to identify and play slot machines with a positive expected value. AP players only play when the numbers are in their favor.
Grind
The process of playing through +EV situations repeatedly over many sessions. AP is often a grind — small edges played consistently add up to meaningful profit, but individual sessions can be losing ones.
Frequently Asked
Common questions about session
Often 5–30 minutes. The session ends when the trigger fires or when the meter has been ground past +EV — whichever comes first.
If the play is +EV and the bankroll holds, no. The cost of a break is forfeiting your seat to another player. If the seat is at risk, push through.
Recompute EV. As you put coin-in through, the meter changes — sometimes upward (+EV stays), sometimes flat (+EV erodes). At some coin-in level, even good plays turn -EV.
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