How Arbitrage Works

In a 3-way market, you take the best available home, draw, and away prices and sum their reciprocals. If the result is below one, the market combination creates theoretical room for a profit regardless of outcome.

That threshold matters because the total implied probability of the stitched-together prices is below 100%. Once it goes above the threshold, the edge disappears no matter how attractive one individual price looks.

The raw formula is easy to exploit accidentally if the underlying data is messy. The same event has to match exactly, the market type must be identical, and timestamps across books need to be close enough that the opportunity is still likely to exist when a user acts.

This is why the platform rejects low odds, suspiciously large profit claims, and combinations that look valid only because one bookmaker is delayed or temporarily suspended.

Once a real arb is found, stake sizes are allocated by reciprocal weight so the payout stays balanced across outcomes. That math is useful only if the user can still get matched at those exact prices.

Operationally, the better workflow is to confirm the legs first, then split stakes. The worst version is calculating a perfect arb on stale inputs and discovering the last leg moved before placement.

EV looks for underpriced probability on a single outcome. Arbitrage looks for a fully covered set of outcomes where the combined price map is mathematically favorable. They can overlap, but they are not the same product or decision path.

That distinction matters because the user intent is different. EV leads into judgment and comparison. Arbitrage leads into timing, coverage, and precise execution.