A multi-leg bet where every selection must win. Combined odds are the product of each leg, so the potential payout grows fast — but a single losing leg sinks the whole slip.
A handicap market that removes the draw by giving one team a virtual goal head-start (or deficit), sometimes split across half-goal lines like -0.25 or -1.5.
A feature that lets you settle a bet early at a price the book offers based on the current state of play. Useful for locking in profit or cutting losses.
The long-run average outcome of a bet, calculated as (probability of winning × profit) − (probability of losing × stake). Positive EV bets are profitable over time.
A bookmaker promo token that lets you place a bet without risking your own money — but the stake is usually not returned with winnings (you win profit only).
A virtual goal head-start applied to one team to balance an uneven match-up. European handicaps allow draws; Asian handicaps split lines and refund pushes.
The break-even win rate implied by a price. Calculated as 1 / decimal odds, expressed as a percentage. Used to compare market lines against your own estimate.
A staking formula that sizes each bet as a fraction of bankroll proportional to your edge. Maximises long-term growth but most pros use a half-Kelly variant to dampen variance.
The price a bookmaker offers for a bet to win. Expressed in decimal, fractional or American format — each is just a different way of writing the same payout ratio.
Return on Investment. Net profit divided by total amount staked, expressed as a percentage. The single best metric for comparing your betting performance over time.
A combination of bets across multiple bookmakers that guarantees a profit regardless of which outcome wins, exploiting odds differences. Most books restrict accounts caught arbing.
A bet where your estimated probability of winning is higher than the implied probability of the odds. Consistently finding value is the only way to win long-term.
The number of times a bonus (or bonus + deposit) must be wagered before withdrawal. A 35x bonus wagering on a £20 bonus means £700 in turnover before the bonus converts to cash.