market
Over/Under
Also known as: O/U, Total
Over/under refers to a bet on whether a statistic (a game total, a player prop, a team total) will finish above or below a posted line. It is the most general two-way market structure in sports betting.
Over/under is the most common bet structure: pick a side of a line. It applies to game totals (combined team scoring), team totals (one team’s scoring), player props (any countable player statistic), and increasingly to game-flow props (first-half points, race-to-15, etc.).
The half-point in most over/under lines is intentional. It eliminates the possibility of a push: 22.5 cannot equal an integer score. Some markets use integer lines (e.g., over 23 points), in which case a score exactly on the line pushes and the bet refunds. Books prefer half-points because pushes create complaints and ambiguity; bettors sometimes prefer integer lines because the push option reduces variance.
Worked example. NBA player rebounds prop: 7.5 (-110/-110). The player has averaged 8.4 rebounds across the last 10 games. The naive read favors the over. But: the matchup is against a fast-paced team where the player tends to play smaller-lineup minutes (giving up some rebounding opportunity), and a key teammate (a strong defensive rebounder) is back from injury after missing the last 3 games. The model adjusts for both factors and projects 7.1 rebounds, with the over at roughly 46% probability. The recreational “back the average” play is the under, by a small margin.
Elite Picks runs the over/under analysis automatically on every prop line for every player on the slate. The model produces a probability for each side, compares against the no-vig implied probability of the line, and flags edges that clear a configurable EP-score threshold. The over/under structure is the dominant market type the platform analyzes.
Example
A player prop line is set at 22.5 points. The over wins if the player scores 23 or more; the under wins if they score 22 or fewer. Both sides priced at -110 means a bettor risks $110 to win $100 either way.