Concepts
Why surebets exist (and vanish)
A surebet is a temporary disagreement between bookmakers, and bookmakers disagree constantly because each prices matches with its own models, traders and customers. The disagreement is real money while it lasts, and it usually does not last long. Understanding why tells you exactly how fast you must be.
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Where disagreements come from #
Four engines produce nearly every arb you will ever see:
- Reaction speed: news (lineups, injuries, weather) moves the sharp books within seconds; slower books follow minutes later. The lag between them is an arb window.
- Customer balancing: a bookmaker drowning in bets on one side shades its odds to attract the other side, drifting away from the market consensus on purpose.
- InPlay chaos: during a match every dangerous attack reprices everything. Books update at different rhythms, so live arbs are more frequent AND larger, with lifespans measured in seconds.
- Plain errors: a typo, a misplaced line, a model glitch. These create the spectacular percentages, and they are the ones bookmaker terms allow to void. Treat 10 percent and up as radioactive.
How long an arb lives #
PreMatch arbs between big books commonly live minutes; niche-league and cross-market arbs can survive longer because fewer eyes check them. InPlay arbs live seconds: the next match event reprices one leg and the window shuts.
Scanner speed decides which part of that lifetime you see. OddStorm delivers InPlay surebets within 1 to 3 seconds of the odds appearing and PreMatch within about 15: you receive the window near its opening, not after other arbers have eaten it.
The odds history is your lie detector #
Every OddStorm arb shows the odds history with 'seen' and 'change' timestamps: how the price moved and how fresh each leg is. A leg that has been flapping every few seconds will not wait for your second placement; a leg frozen for an hour on a busy market may not exist at the bookmaker anymore.
When the odds move mid-arb anyway #
It will happen. The damage-control ladder, in order:
- Take the best remaining price on the uncovered side immediately, even at a small locked loss. A known -1 percent beats an open gamble.
- If an exchange lists the market, close there: lay off the exposure for a fixed cost.
- Log it and study the pattern. If one bookmaker keeps moving before your second leg, place its leg first in future arbs or drop it from fast pairs.
Where to go next #
Speed is half the craft; the other half is not needing speed at all. The beginner-mistakes guide covers the placement discipline that keeps moved odds from hurting.
Related questions
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