Finding Arbs: The Challenge
Arbitrage opportunities exist because odds at different bookmakers briefly diverge. "Briefly" is the key word — most arbs last seconds to a few minutes before the market corrects itself.
To profit consistently, you need to:
- Monitor dozens of bookmakers simultaneously
- Compare thousands of odds combinations across multiple markets
- Identify opportunities the moment they appear
- Calculate optimal stake allocation instantly
- Place bets before the window closes
Doing this manually is practically impossible at scale. But understanding how scanners work makes you a better arber.
Manual Scanning: When It Works
Manual scanning has a place for beginners learning the ropes. You can:
- —Pick a single sport (e.g. football) and compare two or three bookmakers
- —Focus on match winner markets where there are only 2–3 outcomes
- —Use a spreadsheet to calculate implied probabilities and identify gaps
Formula: Implied probability = 1 / decimal odds
If the sum of implied probabilities across all outcomes is less than 1 (100%), you have an arb.
Example: - Team A odds: 2.20 → implied prob = 1/2.20 = 0.4545 (45.45%) - Draw odds: 3.60 → implied prob = 1/3.60 = 0.2778 (27.78%) - Team B odds: 4.10 → implied prob = 1/4.10 = 0.2439 (24.39%)
Sum = 0.4545 + 0.2778 + 0.2439 = 0.9762
Total implied probability below 100% = arb opportunity. Your margin is approximately 2.4%.
Why Manual Scanning Fails at Scale
The biggest bookmakers update odds hundreds of times per match — before kick-off and during live betting. By the time you've compared two bookmakers, the odds may have already moved.
Successful arbers operate at machine speed. A software scanner:
- —Polls every bookmaker's API every few seconds
- —Computes all combinations across outcomes instantly
- —Ranks opportunities by profit margin
- —Alerts you in real time
What to Look for in an Arb Scanner
Not all scanners are equal. The best platforms offer:
Coverage — How many bookmakers are included? More coverage = more opportunities. Suremargin tracks 40+ bookmakers across UK, EU, US, and AU markets.
Speed — How frequently are odds updated? Delays of even 30 seconds matter.
Accuracy — Does the platform filter out errors and stale odds? False positives waste your time and can result in one-sided bets.
Stake calculator — The platform should tell you exactly how much to stake on each outcome to lock in your target profit.
Sports coverage — Football, tennis, basketball, and American sports all generate arb opportunities. The more sports covered, the more chances you have.
Using Suremargin
Suremargin does all of the above automatically. When you log into your dashboard, you see a live feed of current arb opportunities sorted by profit margin. Each entry shows:
- —The two bookmakers offering divergent odds
- —The exact stake allocation for a £100 base bet
- —The guaranteed profit in pound/percentage terms
- —The sport and market type
Final Tip: Act Fast
Even with a scanner, you still need to be quick. Once you spot an opportunity, open both bookmaker sites in separate tabs and place both bets as close together in time as possible. If one odds moves before you place, recalculate before confirming.
Speed, discipline, and the right tools separate profitable arbers from those who miss the window.