What does ROI mean in betting?

ROI (Return on Investment) is total profit divided by total staked, shown as a percentage. It is the fairest way to compare tipsters.

A value bet is one where the odds offered are longer than the true probability of the outcome — the core of any winning long-term strategy.

What is the difference between backing and laying?

Backing is betting for an outcome to happen. Laying, available on betting exchanges, is betting against an outcome — you win if it does not happen.

What is the overround?

The overround is the bookmaker's margin: the implied probabilities of all outcomes total more than 100%, and that extra is the bookmaker's built-in edge.

What does ROI mean in betting?

ROI (Return on Investment) is total profit divided by total staked, shown as a percentage. It is the fairest way to compare tipsters because it accounts for how much was risked to achieve the profit.

A value bet is one where the odds offered are longer (bigger) than the true probability of the outcome. Consistently backing value is the only reliable route to long-term profit.

What is the difference between backing and laying?

Backing is betting for an outcome to happen (the standard bet). Laying, available on betting exchanges, is betting against an outcome — you win if it does not happen.

What is the overround?

The overround is the bookmaker's margin: when you add up the implied probabilities of all outcomes they total more than 100%. That extra is the bookmaker's built-in edge.

Glossary

Betting Terms Explained

Betting has a language all of its own. This is our plain-English glossary of the terms you'll meet across TipsterCheck and the wider betting world — so nothing a tipster says ever catches you out.

Ready to put the jargon to use? Browse independently reviewed tipsters, learn the bet types or read our betting strategies.

In short

Betting terminology is the specialist vocabulary used across sports betting. The most important terms to know are ROI (profit as a percentage of total stakes), value bet (odds bigger than the true probability), bankroll (the money set aside for betting), stake (the amount wagered) and each-way (a win and place bet in one). Use the searchable A–Z below for any term.

Showing 46 of 46 terms

Accumulator (Acca): A single bet combining four or more selections where every leg must win for the bet to pay out. The odds multiply together for large potential returns, but one losing leg loses the lot.
Ante-post: A bet placed well in advance of an event, often at bigger prices. In most cases your stake is lost if your selection is withdrawn before the event starts.
Arbitrage (Arbing): Backing every possible outcome of an event across different bookmakers whose combined odds guarantee a small profit regardless of the result.
Asian Handicap: A handicap market that removes the draw using half and quarter-goal lines, splitting your stake to reduce risk compared with a traditional handicap.
Backing: Betting on an outcome to happen — the standard way of betting with a bookmaker, as opposed to laying (betting against) on an exchange.
Banker: The selection a bettor is most confident about, often used as the anchor of a multiple or system bet.
Bankroll: The total pot of money you have set aside specifically for betting. Sensible bettors only stake a small, fixed percentage of it per bet.
Betting Exchange: A platform where bettors bet against each other rather than a bookmaker. You can back (bet for) or lay (bet against) an outcome, with the exchange taking commission on winnings.
Both Teams to Score (BTTS): A yes/no market on whether both teams will find the net during a match, regardless of the final result.
Cash Out: Settling a bet early for a value offered by the bookmaker before the event ends — locking in a profit or limiting a loss. The price usually favours the bookmaker.
Closing Line Value (CLV): The difference between the odds you took and the final (closing) odds. Consistently beating the closing line is a strong sign of long-term betting skill.
Correct Score: A market predicting the exact final score of a match. Hard to call, so the odds and potential reward are high.
Double: A bet on two selections where both must win. The winnings from the first roll onto the second.
Draw No Bet (DNB): A bet on the home or away team where your stake is refunded if the match ends in a draw.
Dutching: Splitting your stake across several selections in the same event so that you win the same amount whichever of them comes in.
Each-way (E/W): Two bets in one: half the stake on a selection to win, half on it to place (finish in the top few positions per the bookmaker's terms).
Edge: A bettor's mathematical advantage over the bookmaker's odds. Long-term profit is only possible with a genuine, repeatable edge.
Evens (Even money): Odds of 2.0 (or 1/1) where you win the same amount as you stake. An implied probability of 50%.
Expected Value (EV): The average amount a bet would win or lose if repeated many times. Positive EV (+EV) bets are the foundation of profitable betting.
Favourite: The selection considered most likely to win, reflected by the shortest odds in the market.
Forecast: Predicting the first two finishers of a race in the correct order (straight forecast) or either order (reverse forecast).
Fractional Odds: The traditional UK odds format (e.g. 5/1). The first number is your profit relative to the second number staked.
Handicap: A market giving one selection a virtual head start or deficit to level a mismatch, offering better odds on strong favourites.
Hedging: Placing an opposing bet to reduce risk or guarantee a return on an existing position, often used to lock in profit before an event ends.
In-play (Live) betting: Betting after an event has started, with odds shifting in real time as the action unfolds.
Kelly Criterion: A staking formula that sizes each bet according to your perceived edge and the odds, aiming to maximise long-term bankroll growth.
Laying: Betting against an outcome on an exchange — effectively acting as the bookmaker. You win if the outcome does not happen.
Lucky 15: Four selections in 15 bets (four singles, six doubles, four trebles and a fourfold), often with bookmaker bonuses for all-winners or a single winner.
Matched Betting: A technique that uses free bets and promotions, backing at a bookmaker and laying on an exchange, to extract the bonus value with little risk.
Nap: A tipster's single strongest selection of the day — their most confident pick.
Odds-on: Odds shorter than evens (below 2.0), meaning you risk more than you stand to win because the outcome is judged likely.
Over/Under (Totals): A market on whether a total (goals, points, corners, etc.) will be above or below a set line, such as over 2.5 goals.
Overround (Vig / Margin): The bookmaker's built-in profit margin, where the implied probabilities of all outcomes add up to more than 100%.
Poisson Distribution: A statistical model used to estimate the probability of goal outcomes in football, based on teams' expected scoring rates.
Price: Another word for the odds on a selection. 'Taking a price' means backing a selection at the odds available now.
Push (Void): A bet that is settled with no win or loss, with the stake returned — common on handicap and totals lines that land exactly on the number.
Return on Investment (ROI): Total profit divided by total amount staked, expressed as a percentage. The truest measure of a tipster's or bettor's performance.
Single: A bet on one selection. It wins if that outcome is correct — the simplest and lowest-risk bet.
Stake: The amount of money placed on a bet.
Steam: A rapid, widespread shortening of odds as significant money is placed on a selection across the market.
System Bet: A multiple bet that combines selections into several smaller wagers (like a Yankee or Trixie) so you can still profit without every pick winning.
Treble: A bet on three selections where all three must win.
Trust Score: TipsterCheck's independent rating of a tipster's reliability and reputation, based on verified reviews and track record rather than self-reported results.
Value Bet: A bet where the odds are longer than the true probability of the outcome — the core of any winning long-term strategy.
Yankee: Four selections in 11 bets (six doubles, four trebles and one fourfold) with built-in cover if not every leg wins.
Yield: Similar to ROI — the average profit per unit staked, used to judge a tipster's efficiency independently of stake size.

Betting terms FAQ

What does ROI mean in betting?: ROI (Return on Investment) is total profit divided by total staked, shown as a percentage. It is the fairest way to compare tipsters because it accounts for how much was risked to achieve the profit.
What is a value bet?: A value bet is one where the odds offered are longer (bigger) than the true probability of the outcome. Consistently backing value is the only reliable route to long-term profit.
What is the difference between backing and laying?: Backing is betting for an outcome to happen (the standard bet). Laying, available on betting exchanges, is betting against an outcome — you win if it does not happen.
What is the overround?: The overround is the bookmaker's margin: when you add up the implied probabilities of all outcomes they total more than 100%. That extra is the bookmaker's built-in edge.

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Betting terms FAQ

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