How we compare odds
How OddsKeepr marks the best price, works out the fair price and decides which sportsbooks to show.
Best price
For each outcome we compare the prices of the sportsbooks shown and mark the highest as the best price. When several sportsbooks offer that price, each one is marked.
Spreads and totals are compared on the main line only: the point most sportsbooks offer. A price on another point is a different bet.
Once you choose a place where online betting is legal, only the sportsbooks licensed there take part; before that, and where it is not legal, every sportsbook licensed in the country does. Commission never changes which price is marked best or the order of the sportsbooks.
Commission is explained in How we make money.
Fair price
The fair price is our estimate of what a price would be without the sportsbook's margin. For each outcome we take the median price of the sportsbooks that count towards it, then remove the margin by scaling the implied probabilities of all the outcomes so they add up to 100%.
For example, three sportsbooks price a game at 1.87, 1.91, 1.95 for the home side and 1.95, 1.91, 1.87 for the away side. The medians are 1.91 and 1.91, whose implied probabilities add up to 104.7%. Without that margin each side is 50.0%, a fair price of 2.00.
Exchanges never count towards the fair price, and neither do the few sportsbooks we list as sharp.
Fair prices for Ireland use the sportsbooks licensed in the United Kingdom.
Fair prices for New Zealand use the sportsbooks licensed in Australia.
Fair prices on our home page use the sportsbooks licensed in the United Kingdom and Australia.
Work one out yourself with the no-vig calculator.
Exchanges
Exchanges, whose prices are set by their customers rather than by a sportsbook, are listed apart from sportsbooks and never counted as sportsbooks. Switch between the two with "Sportsbooks | Exchanges" on any board that has both.
An exchange price is never marked best among sportsbooks and never counts towards the fair price. In the exchanges view, exchange prices are compared among themselves, as listed and before the exchange's fees.
How fresh the prices are
We update each league's prices on a schedule, more often as kickoff gets closer. Every board says when its prices were last updated.
When a board has not updated for twice its usual interval, and at least 30 minutes, its prices are marked as out of date and no best price is marked until they update.
Once a game starts, its page shows the closing line: the last prices before kickoff.
Which sportsbooks we show
A link only takes you to a sportsbook where it holds a licence; until we know where you are, it asks first. Where online betting is not legal, the sportsbooks licensed elsewhere in the country are shown for information, without links. Each licence we record has a source and a date: the regulator's register where we have read it, otherwise a published tracker we are checking against the regulators.
Each place's betting rules carry their source and the date we checked them, and each country's legal betting page shows both. Where a check against the regulator is still open, the page says so.