Vig / Juice / Margin
Definition
The bookmaker's commission built into the odds. It's why both sides of a bet typically have negative EV. Standard vig is around 4.5% (both sides at -110).
Example
-110/-110 pricing means the book takes ~4.5% regardless of outcome.
Related terms
Decimal Odds
The most common odds format globally. Represents the total return (including stake) for a winning bet. Used throughout the EVSignals API.
American Odds
Odds format common in the US. Positive odds (+150) show profit on a $100 bet. Negative odds (-150) show the stake needed to profit $100.
Moneyline (ML)
A bet on which team will win outright, with no point spread involved. The favorite has lower payout odds while the underdog has higher odds.
Spread / Point Spread
A handicap applied to level the playing field between teams. The favorite must win by more than the spread; the underdog can lose by less than the spread or win outright.
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