# OddStorm > OddStorm is a real-time sports arbitrage (surebets) and odds comparison > service, on the market since October 2007. It scans 80+ bookmakers in real > time (in-play in 1-3 seconds, pre-match in ~15) and delivers surebets, > middles and unique cross-market Polish Middles with the stakes already > split, via a Web app and a Windows desktop app. A free account requires > no card; subscriptions unlock the full surebet range from -1% up to 300%. Key facts: arbitrage (a surebet) means backing every outcome of one match at different bookmakers whose odds disagree, locking a profit whichever side wins. Example at odds 2.08 / 2.10: a EUR 1,000 bankroll splits into EUR 502 + EUR 498 and returns about EUR 1,045 either way (+4.5%). Arbitrage betting is legal: you simply place bets at published odds. ## Product - [Homepage](https://www.oddstorm.com/): What OddStorm does, live coverage numbers, free vs paid plans, FAQ - [What is a surebet](https://www.oddstorm.com/surebet/): Educational page on sports arbitrage and how to turn gambling into investing - [Why OddStorm](https://www.oddstorm.com/whyoddstorm): 16 reasons OddStorm beats alternatives (speed, coverage, unique products) - [Plans and pricing](https://www.oddstorm.com/prices): Pro and Elite tiers for PreMatch, InPlay or both; free trial - [Supported Bookmakers](https://www.oddstorm.com/bookmakers): Live list of scanned bookmakers with PreMatch and InPlay availability (viewing requires a free OddStorm account) - [Arbitrage calculator](https://www.oddstorm.com/surebets/fixedcalculator/1x2): Free stake-split calculator for every arbitrage type - [Download the desktop app](https://www.oddstorm.com/download/): Windows client ## Help - [Help Center](https://www.oddstorm.com/help): Support hub - [FAQ](https://www.oddstorm.com/help/faq): Frequently asked questions ### Getting started - [What is OddStorm?](https://www.oddstorm.com/help/faq#q-what) - [Does OddStorm place bets automatically?](https://www.oddstorm.com/help/faq#q-autobot) - [Web app or desktop app: what is the difference?](https://www.oddstorm.com/help/faq#q-platforms) - [Can I use OddStorm on a Mac?](https://www.oddstorm.com/help/faq#q-mac) - [Is there a free trial?](https://www.oddstorm.com/help/faq#q-trial) ### Arbitrage essentials - [Is arbitrage betting legal?](https://www.oddstorm.com/help/faq#q-legal) - [How much money do I need to start?](https://www.oddstorm.com/help/faq#q-bankroll) - [How many bookmaker accounts do I need?](https://www.oddstorm.com/help/faq#q-howmanybooks) - [How much can I realistically earn?](https://www.oddstorm.com/help/faq#q-profit) - [What are the most common beginner mistakes?](https://www.oddstorm.com/help/faq#q-mistakes) - [Why do odds move and how fast do I need to act?](https://www.oddstorm.com/help/faq#q-whyoddsmove) - [Why should I avoid arbs above 10 percent?](https://www.oddstorm.com/help/faq#q-palps) - [InPlay or PreMatch arbing: which should I choose?](https://www.oddstorm.com/help/faq#q-liveprematch) - [How do I avoid getting limited by bookmakers?](https://www.oddstorm.com/help/faq#q-limitation) - [Do I owe taxes on arbitrage profit?](https://www.oddstorm.com/help/faq#q-taxes) ### Plans and billing - [What is the difference between Pro and Elite?](https://www.oddstorm.com/help/faq#q-proelite) - [What plans are available?](https://www.oddstorm.com/help/faq#q-available) - [How much does it cost?](https://www.oddstorm.com/help/faq#q-cost) - [Do subscriptions renew automatically?](https://www.oddstorm.com/help/faq#q-renew) - [What happens if I buy a second subscription?](https://www.oddstorm.com/help/faq#q-stack) - [Can I get a refund?](https://www.oddstorm.com/help/faq#q-refund) - [Can I pause my subscription?](https://www.oddstorm.com/help/faq#q-pause) - [Can I transfer my subscription to someone else?](https://www.oddstorm.com/help/faq#q-transfer) - [Why do I see profits capped at 0.50% and hidden names?](https://www.oddstorm.com/help/faq#q-cap) ### Using OddStorm - [Which bookmakers do you support?](https://www.oddstorm.com/help/faq#q-bookmakers) - [Can I filter by market or period (1X2, Over/Under, corners)?](https://www.oddstorm.com/help/faq#q-markets) - [What is Navigation?](https://www.oddstorm.com/help/faq#q-navigation) - [How do I access Back/Lay surebets?](https://www.oddstorm.com/help/faq#q-backlay) - [What does a red arbitrage mean?](https://www.oddstorm.com/help/faq#q-colors) - [Do you offer value bets?](https://www.oddstorm.com/help/faq#q-valuebets) ### Troubleshooting - [The odds do not match my bookmaker. What should I send you?](https://www.oddstorm.com/help/faq#q-wrongodds) - [The desktop app says 'no network' but my internet works](https://www.oddstorm.com/help/faq#q-desktoplogin) - [A bookmaker stopped updating. Is it down?](https://www.oddstorm.com/help/faq#q-bookiedown) - [Which bookmakers are legal in my country?](https://www.oddstorm.com/help/faq#q-licensing) - [Do you support brokers (BetInAsia, MollyBet)?](https://www.oddstorm.com/help/faq#q-brokers) - [Do you offer an odds API?](https://www.oddstorm.com/help/faq#q-api) ## Guides - [What is sports arbitrage?](https://www.oddstorm.com/guides/what-is-sports-arbitrage): Sports arbitrage (a surebet, or arb) is betting on every possible outcome of one match at different bookmakers whose odds disagree, so that - [How much money do I need?](https://www.oddstorm.com/guides/how-much-money-do-i-need): You can learn arbitrage with a few hundred euro, but the arithmetic starts paying for the time you spend from roughly EUR 1,000 to 2,000 spr - [How many bookmaker accounts do I need?](https://www.oddstorm.com/guides/how-many-bookmakers): Around ten is the practical starting point: enough that arbs regularly appear between books you actually hold, few enough to manage deposits - [How much can you realistically earn?](https://www.oddstorm.com/guides/realistic-profit): Active arbers commonly target 10 to 20 percent of their bankroll per month. Not per bet, not guaranteed, and not passive: the number comes f - [Is arbitrage betting legal?](https://www.oddstorm.com/guides/is-arbitrage-betting-legal): Yes. Arbitrage betting is placing ordinary bets at odds the bookmakers themselves published. No law anywhere forbids betting on all outcomes - [The beginner mistakes that actually cost money](https://www.oddstorm.com/guides/beginner-mistakes): Arbitrage cannot lose once both legs are placed correctly, so every beginner loss is a process mistake. The good news: the list of process m - [The arbitrage action plan](https://www.oddstorm.com/guides/arbitrage-action-plan): From zero to your first settled arb in eight steps and about two weeks. Nothing here is theory: this is the exact sequence we would follow o - [Two-way and three-way surebets](https://www.oddstorm.com/guides/two-way-and-three-way-surebets): A two-way surebet covers a match with two bets whose outcomes cannot both lose (Over vs Under, home win vs 'draw or away'). A three-way sure - [Middles: the arbs where both bets can win](https://www.oddstorm.com/guides/middles): A middle is built like a surebet, but the two legs leave a gap between them: results inside the gap win BOTH bets at once. You pay a small g - [Polish middles: betting against the gap](https://www.oddstorm.com/guides/polish-middles): A Polish middle is a middle turned inside out: the two legs pay a locked profit on EVERY result except one narrow gap, where you take a know - [Asian handicap, the arber's workhorse](https://www.oddstorm.com/guides/asian-handicap): An Asian handicap (AH) gives one team a virtual head start, turning a three-outcome football match into a two-outcome bet. For arbers AH is - [Moneyline and draw no bet](https://www.oddstorm.com/guides/moneyline-and-draw-no-bet): Moneyline is the plain 'who wins' bet: two outcomes in sports without draws, and in football usually offered as draw no bet (DNB), where a d - [Three-way (European) handicap](https://www.oddstorm.com/guides/three-way-handicap): A European handicap (EH) applies a whole-goal head start like AH does, but keeps three outcomes: the favorite covers, the underdog covers, o - [Back/Lay surebets](https://www.oddstorm.com/guides/back-lay-surebets): A Back/Lay surebet pairs a normal bet at a bookmaker (the back: it WILL happen) with the opposite position at a betting exchange like Betfai - [Why surebets exist (and vanish)](https://www.oddstorm.com/guides/why-surebets-exist): A surebet is a temporary disagreement between bookmakers, and bookmakers disagree constantly because each prices matches with its own models - [The arber's glossary](https://www.oddstorm.com/guides/betting-glossary): Every term and abbreviation you will meet in OddStorm, at bookmakers and in these guides, defined in one line each. Bookmark this page; the - [Avoiding bookmaker limits](https://www.oddstorm.com/guides/avoid-bookmaker-limits): Soft bookmakers limit accounts that look professional. You cannot make an account unlimitable, but you decide how loudly your betting announ - [Palpable errors and cancellations](https://www.oddstorm.com/guides/palpable-errors-and-cancellations): A palpable error (palp) is a price so obviously wrong that bookmaker terms allow the bet to be voided or resettled at corrected odds. For an - [Account verification without the pain](https://www.oddstorm.com/guides/bookmaker-verification-kyc): Every bookmaker will verify your identity (KYC), and by default it happens at the worst moment: when you first try to withdraw, freezing you - [E-wallets: the arber's money hub](https://www.oddstorm.com/guides/e-wallets-for-arbers): Arbitrage means money parked at many bookmakers that constantly unbalances: winners grow fat while losers run dry. An e-wallet (Skrill and N - [VPN and account security](https://www.oddstorm.com/guides/vpn-and-account-security): A VPN is a security tool, and arbers with money spread across a dozen gambling accounts need security more than most. What a VPN is NOT is a - [Settlement rules: the same bet that isn't](https://www.oddstorm.com/guides/settlement-rule-differences): An arbitrage covers every outcome only if both legs settle on the SAME definition of the outcome. Two bookmakers can call a market by the sa - [Soft and sharp bookmakers](https://www.oddstorm.com/guides/soft-vs-sharp-bookmakers): Soft bookmakers are the recreational brands: slower odds, bigger margins, quick to limit winners. Sharp bookmakers price with thin margins, - [Clone bookmakers](https://www.oddstorm.com/guides/clone-bookmakers): Many bookmaker brands are the same product underneath: one platform, one odds feed, many storefronts. These clones matter to arbers twice: a - [InPlay arbing](https://www.oddstorm.com/guides/inplay-arbing): InPlay is where arbitrage pays best: live odds move every second, so disagreements are bigger and more frequent than PreMatch. It is also wh - [The best time to arb](https://www.oddstorm.com/guides/best-time-to-arb): If your hours are limited, spend them where the fixtures are: Saturday first, Sunday second, and within any day, the hours around kickoffs a - [Bonus hunting](https://www.oddstorm.com/guides/bonus-hunting): Nearly every bookmaker pays new customers a deposit bonus, and arbitrage is the cleanest machine for converting those bonuses into withdrawa - [Getting started with OddStorm](https://www.oddstorm.com/guides/getting-started-with-oddstorm): OddStorm runs in your browser: create a free account, open the PreMatch or InPlay feed, and live surebets start flowing with the stakes alre - [The OddStorm desktop app](https://www.oddstorm.com/guides/oddstorm-desktop-app): The web app covers the full surebet feed in any browser; the desktop app is the Windows client for the features that need deeper integration - [Surebet Navigation](https://www.oddstorm.com/guides/surebet-navigation): Navigation is the Elite feature of the desktop app: one click on an arb's leg opens the bookmaker's site and navigates straight to that even - [Reading the calculator](https://www.oddstorm.com/guides/reading-the-calculator): The calculator is where an arb becomes actual bets: enter your total and it splits the stakes so every outcome returns the same amount. This - [Payments and subscriptions](https://www.oddstorm.com/guides/payments-and-subscriptions): An OddStorm plan is three choices: a tier (Pro, or Elite which adds Navigation), a product (PreMatch, InPlay, or both) and a duration (1, 6 - [Reporting wrong odds](https://www.oddstorm.com/guides/reporting-wrong-odds): Sometimes the odds at your bookmaker do not match what OddStorm shows. Usually the explanation is timing or a clone domain; occasionally it ## Company - [About OddStorm](https://www.oddstorm.com/about): Company and contact information - [News](https://www.oddstorm.com/news): Product milestones since 2007 - [Contact](https://www.oddstorm.com/contact): Support contact form ## Optional - [Terms of service](https://www.oddstorm.com/terms) - [Privacy policy](https://www.oddstorm.com/privacy) - [Recommended sites](https://www.oddstorm.com/recommended)