Asian handicap
An Asian handicap gives one side a head start of a half, whole or quarter goal, removing the draw so the market has two outcomes.
Three kinds of line do the work. A half-goal line such as -0.5 cannot land exactly, so every bet wins or loses. A whole-goal line such as -1 can, and when the winning margin equals the line the stake comes back. A quarter line such as -0.75 splits the stake in two, half on each neighbouring line.
Take -0.75 at 1.90 for 10 units, which is 5 units on -0.5 and 5 on -1. A win by two or more wins both halves and returns 19.00 units. A win by exactly one wins the -0.5 half, returning 9.50, and refunds the -1 half's 5 units, so 14.50 comes back. A draw or a defeat loses all 10.
The smaller quarter line works the same way. -0.25 splits the stake between 0 and -0.5, so at 1.90 for 10 units a draw refunds the 0 half and loses the other, returning 5.00 units, while any win returns 19.00. The mirror line, +0.25, runs the same arithmetic from the other side, so a draw wins one half and refunds the other.
With the draw gone, two prices make the whole market, so its margin takes one line of arithmetic. At 1.95 on each side the book sums to 102.56%. A three-way handicap, by contrast, keeps the draw as a third outcome with a price of its own.
In the OddsRelay feed
Goal totals use the same whole-number and quarter lines, and one place they show up in OddsRelay's feed is the dutching feed. There a whole-number or quarter total can sit in one dutch with a half line, Over 2 beside Under 2.5, each leg keeping its own point. That is why a tool groups a dutch's legs by dutch_id rather than by point.
Before relying on any Asian-handicap market key, a tool reads GET /v2/sports, which lists the market keys seen under each competition on the matched feeds. A markets filter naming a key the feed has not seen is refused with 400 unknown_market and the list of valid keys.
Try it on your own key
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