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What is Arbitrage?

Arbitrage betting (also called “arbing” or “sure betting”) is a strategy where you bet on all possible outcomes of an event across different sportsbooks to guarantee a profit regardless of the result. This works when sportsbooks have different opinions on the same prop, creating pricing inefficiencies.

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How It Works

Example:
  • FanDuel: LeBron Over 25.5 Points at +120
  • DraftKings: LeBron Under 25.5 Points at +110
By betting both sides, you lock in a profit no matter what happens.

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Finding Arbitrage Opportunities

Line Gap automatically scans all player props across sportsbooks to identify arbitrage opportunities.
Data Freshness: Arbitrage opportunities are recalculated every time you refresh your odds. Because Line Gap uses User-Specific Batches, the opportunities you see are based on the exact odds snapshot you just fetched.

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Arbitrage Table Columns

  • Player: Name and team
  • Prop Type: Points, Rebounds, Assists, etc.
  • Line: Over/Under threshold
  • Over Odds: Best odds for over (and which book)
  • Under Odds: Best odds for under (and which book)
  • Profit %: Guaranteed profit percentage
  • Status: Active or Expired

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Profit Calculation

The profit percentage shows your guaranteed return: Profit % = 5.2% On a 100totalstake∗∗,youwouldprofit∗∗100 total stake**, you would profit **5.20 regardless of the outcome.

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How to Execute

1

Identify Opportunity

Find an active arbitrage with acceptable profit %
2

Calculate Stakes

Use the built-in calculator to determine exact bet amounts for each side
3

Place Both Bets Quickly

Bet on both sportsbooks as fast as possible before odds change
4

Collect Profit

One bet wins, one loses, but you profit overall

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Important Considerations

Arbitrage opportunities are time-sensitive and disappear quickly. Odds can change mid-placement.

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Risks

  • Odds Movement: Lines can shift while you’re placing bets
  • Betting Limits: Sportsbooks may limit bet sizes
  • Account Restrictions: Books may limit or ban arbers
  • Different Payouts: Ensure both books grade the prop the same way

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Best Practices

Pre-fund accounts at multiple sportsbooks with available balance
Place bets within seconds of finding the opportunity
Test with smaller amounts until you’re comfortable with the process
Confirm both books use the same stat source and grading criteria
Bet amounts that are easy to calculate and place quickly

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Stake Calculator

For each arbitrage opportunity, Line Gap provides a calculator to determine optimal stake allocation: Example:
  • Total Bankroll: $100
  • Over Odds: +120 (FanDuel)
  • Under Odds: +110 (DraftKings)
Optimal Stakes:
  • Bet on Over: $47.62
  • Bet on Under: $52.38
  • Guaranteed Profit: $5.20

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Why Arbitrage Exists

Sportsbooks have different opinions and risk tolerances, leading to:
  • Different player probability assessments
  • Varying market positions
  • Regional pricing differences
  • Promotional odds boosts
These create temporary pricing inefficiencies that sharp bettors can exploit.

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Next Steps

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