Slot Advantage Play Glossary

A

Advantage play (AP)

Using observable information, documented rules and disciplined evaluation to identify a potentially favorable decision. It does not mean guaranteed profit.

Active state

A feature component currently operating, such as a Wild reel with spins remaining or a limited-duration capture window.

Average feature value

The long-run mean value of a feature across its possible outcomes. It is not the maximum displayed award.

B

Bankroll

Money deliberately allocated to withstand the costs and variance of play, separate from ordinary living expenses.

Bet level

The selected bet option. Bet level can affect feature eligibility, jackpot access, displayed state and cost.

Bounded meter

A meter with a published upper limit or forced event boundary. A bounded event is not automatically a profitable event.

C

Machine

The physical machine and installed game machine setup. Similar titles on different machines may use different rules.

Collector

A visible component that accumulates qualifying symbols, values or events toward an award or feature.

Machine setup

The installed combination of software version, paytable, denomination, bet options, jackpot structure and optional features.

Contribution rate

The rate at which bets or qualifying events add to a meter or progressive. It may be unknown even when the meter is visible.

D

Denomination

The base credit value selected for play. Changing denomination can alter cost, prize values, paytables or stored state.

Drawdown

A decline from a bankroll's previous high point. Positive expected value does not prevent substantial drawdowns.

E

Entry point

A state at which supported expected value, cost and risk assumptions justify playing under a defined strategy.

Expected value (EV)

The probability-weighted average result over many repetitions. A positive estimate does not guarantee that one session will win.

Exposure

The money, time or number of paid events at risk before the opportunity resolves or is abandoned.

F

Feature value

The expected value of a bonus, jackpot path, Wild state or other award mechanism after accounting for its possible outcomes.

Finite cycle

A sequence with a known number of remaining events, such as spins left in an active state.

H

Help screen

The machine's rules, information or paytable menu. It can document eligibility and behavior but may omit probabilities and exact entry points.

Hold & Spin

A feature framework in which landed prize symbols remain while a limited spin counter continues or resets. The term alone does not imply persistent pre-feature value.

J

Jackpot eligibility

The bet, denomination, feature or symbol conditions required for a displayed jackpot to be available.

Linked progressive

A jackpot funded or offered across multiple machines or positions. The displayed amount may be shared even when local feature progress is not.

M

Meter

A numerical or graphical display of value, progress or status. A meter must be tied to a verified rule before it can be evaluated.

Must-hit-by

A progressive or feature guaranteed to award by a stated upper limit. The boundary does not by itself establish positive EV.

P

Perceived persistence

A display that looks saved or developed without sufficient evidence that it changes future value or trigger probability.

Persistent state

Information or feature progress that survives spins, sessions or players and can affect future outcomes or value.

Play-or-pass decision

The structured choice to play, continue watching or decline based on state, cost, value, risk and uncertainty.

Progressive

An award value that increases under defined rules until won and reset. A high progressive is not automatically favorable.

R

Reset

The state to which a meter, collector, jackpot or feature returns after an award or other event.

Reset region

A range of possible starting values rather than one fixed reset amount.

Risk of ruin

The probability that losses exhaust the allocated bankroll before long-run advantage can be realized.

RTP

Return to player: the theoretical long-run percentage returned under a defined paytable and strategy, not a promise for a session.

S

Scouting

Systematically checking machines and recording relevant states before deciding whether further evaluation is warranted.

State ownership

Which game, bet, denomination, machine, linked bank or player session controls a visible state.

Stored value

Displayed prize or feature value retained inside a persistent component. It may still require a qualifying event to award.

V

Variance

The degree to which actual results can spread around expected value. Higher variance produces larger and less predictable swings.

Visible state

Any observable meter, collector, reel position, counter, stored prize or feature condition. Visibility alone does not establish value.

W

Bet eligibility

The minimum or specific bet required for a feature, jackpot or displayed state to apply.

Watch state

A condition worth documenting or monitoring but not supported strongly enough for an immediate play decision.

Use the terms in a real workflow

Continue with What Is Slot Advantage Play?, What Is a Persistent State?, How to Document Machine State and the AP Slot Scouting Checklist.

Frequently asked questions