Guides to arbitrage, +EV and middles

Three ways to bet against the sportsbooks' own prices, explained with real US odds and the same math the ArbWins boards use. Each guide says what goes wrong as plainly as what works.

  1. What is arbitrage betting?

    6 min read ·

    Two sportsbooks disagree enough that you can bet both sides and get paid either way. A worked example with +110 and -102 on a total, why the gap exists, how fast it closes on ArbWins's own measured track record, and the four things that turn an arb into a losing bet: settlement rules, limits, voided bets and rounding.

    Read the guide: What is arbitrage betting?
  2. What is +EV betting?

    5 min read ·

    A +EV bet pays more than its fair chance of winning is worth. How a fair price is estimated by taking the margin out of a sharp book's line, a worked example from -150 and +130, the expected value per $100, why a good bet still loses often, and how much to stake with quarter Kelly.

    Read the guide: What is +EV betting?

Reference

ArbWins is for adults 21 and older, and so is sports betting in Arizona. Arbitrage, +EV bets and middles are math edges, not sure things, and sportsbooks limit accounts that win. If betting stops being fun, the responsible gambling page lists free, confidential help, including 1-800-GAMBLER.