Glossary
Odds formats (decimal, fractional, American)
Odds come in decimal (2.50), fractional (6/4) and American (+150) formats, all expressing the same probability, with decimal the cleanest for computation.
Decimal odds give the total return per unit staked; fractional odds (UK racing tradition) give profit relative to stake; American odds express the stake or return needed for 100 units. They are interchangeable representations of the same implied probability.
A data product normalises to one format, usually decimal, so prices from books quoting different formats compare cleanly. The feed presents odds consistently rather than leaving the conversion to the consumer.
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OddsRelay delivers this as part of one already-matched feed. See live coverage on the coverage dashboard.