Exchange Arbitrage Guide

Learn how to profit from price discrepancies between betting exchanges with our comprehensive guide to arbitrage strategies.

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Use our calculator to find arbitrage opportunities and determine optimal stake sizes.

Arbitrage Results

Implied Probability for Outcome 1: 0%
Implied Probability for Outcome 2: 0%
Total Implied Probability: 0%
Arbitrage Opportunity: No
Profit Percentage: 0%
Stake for Outcome 1: €0
Stake for Outcome 2: €0
Potential Profit: €0

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What is Exchange Arbitrage?

Exchange arbitrage is a risk-free betting strategy that involves taking advantage of price discrepancies between different betting exchanges or between an exchange and a traditional bookmaker. By placing opposing bets at different odds, you can lock in a profit regardless of the outcome.

Unlike traditional betting where you're taking a position on an outcome, arbitrage is about exploiting inefficiencies in the market. The key advantage is that arbitrage opportunities are risk-free - you'll make a profit regardless of the result.

Important: While arbitrage opportunities exist, they are typically small (often less than 1% profit) and can disappear quickly. Successful arbitrage requires fast execution, good bankroll management, and access to multiple exchanges.

Exchange Arbitrage

Types of Exchange Arbitrage

Cross-Exchange Arbitrage

Cross-exchange arbitrage involves taking advantage of price differences between two different betting exchanges. For example, you might back a selection on Betfair at 2.10 and lay the same selection on Betdaq at 2.15.

Example:

Manchester United vs Liverpool:

  • Back Manchester United on Betfair at 2.10
  • Lay Manchester United on Betdaq at 2.15
  • Profit: ~2.3% (before commission)

This strategy requires accounts with multiple exchanges and often specialized software to identify opportunities quickly.

Back/Lay Arbitrage

Back/lay arbitrage involves backing a selection on one exchange and laying the same selection on another exchange or the same exchange. This is the most common form of arbitrage and can be executed on a single exchange.

Example:

Rafael Nadal vs Novak Djokovic:

  • Back Nadal on Betfair at 1.95
  • Lay Nadal on the same exchange at 1.98
  • Profit: ~1.5% (before commission)

This strategy is particularly effective when there's a significant price movement in a short period, creating a discrepancy between the back and lay prices.

Exchange-to-Bookmaker Arbitrage

Exchange-to-bookmaker arbitrage involves taking a position on a traditional bookmaker and the opposite position on an exchange. This can be particularly profitable when bookmakers offer promotional odds or when there are significant price discrepancies.

Example:

Golden State Warriors vs LA Lakers:

  • Back Warriors on Pinnacle at 1.85
  • Lay Warriors on Betfair at 1.90
  • Profit: ~2.7% (before commission)

This strategy requires accounts with both traditional bookmakers and exchanges, and often a broker to access restricted bookmakers.

Multi-Way Arbitrage

Multi-way arbitrage involves taking advantage of price discrepancies across multiple outcomes of the same event. This is more complex but can be more profitable, especially in markets with three or more possible outcomes.

Example:

Football match (Home Win/Draw/Away Win):

  • Back Home Win on Exchange A at 2.20
  • Back Draw on Exchange B at 3.50
  • Back Away Win on Exchange C at 3.80
  • Total implied probability: 97.5%
  • Profit: ~2.5% (before commission)

This strategy requires more sophisticated calculations and often specialized software to identify opportunities.

How to Calculate Arbitrage Opportunities

To identify an arbitrage opportunity, you need to calculate the implied probabilities of all possible outcomes and check if they sum to less than 100%. If they do, you have an arbitrage opportunity.

Two-Way Arbitrage Calculation

For a two-way market (e.g., a tennis match), the calculation is straightforward:

  1. Convert decimal odds to implied probabilities:
    • Implied Probability = (1 / Decimal Odds) × 100
  2. Add the implied probabilities of all outcomes
  3. If the total is less than 100%, you have an arbitrage opportunity
  4. The profit percentage = 100% - Total Implied Probability

Example:

Nadal (1.95) vs Djokovic (1.95)

  • Nadal implied probability = (1 / 1.95) × 100 = 51.28%
  • Djokovic implied probability = (1 / 1.95) × 100 = 51.28%
  • Total = 102.56%
  • No arbitrage opportunity (total > 100%)

If you find Nadal at 1.90 and Djokovic at 1.95:

  • Nadal implied probability = (1 / 1.90) × 100 = 52.63%
  • Djokovic implied probability = (1 / 1.95) × 100 = 51.28%
  • Total = 103.91%
  • Still no arbitrage opportunity

But if you find Nadal at 1.85 and Djokovic at 1.95:

  • Nadal implied probability = (1 / 1.85) × 100 = 54.05%
  • Djokovic implied probability = (1 / 1.95) × 100 = 51.28%
  • Total = 105.33%
  • No arbitrage opportunity

Calculating Stake Sizes

To maximize your profit, you need to calculate the optimal stake sizes for each bet. Here's how:

  1. Determine your total investment amount
  2. Calculate the stake for each outcome:
    • Stake = (Total Investment × Implied Probability) / Total Implied Probability

Example:

If you have an arbitrage opportunity with:

  • Outcome A: Odds 2.00 (Implied Probability 50%)
  • Outcome B: Odds 2.10 (Implied Probability 47.62%)
  • Total Implied Probability: 97.62%
  • Profit: 2.38%

And you want to invest $1,000:

  • Stake on Outcome A = ($1,000 × 50%) / 97.62% = $512.19
  • Stake on Outcome B = ($1,000 × 47.62%) / 97.62% = $487.81

If Outcome A wins: $512.19 × 2.00 = $1,024.38 (Profit: $24.38)

If Outcome B wins: $487.81 × 2.10 = $1,024.40 (Profit: $24.40)

Tools for Exchange Arbitrage

Arbitrage Calculators

Arbitrage calculators help you quickly determine if an opportunity exists and calculate the optimal stake sizes. Many are available online, or you can use spreadsheet software to create your own.

Odds Comparison Tools

Odds comparison tools aggregate odds from multiple bookmakers and exchanges, making it easier to spot discrepancies. Some tools also alert you when arbitrage opportunities arise.

Exchange APIs

For serious arbitrage traders, using exchange APIs can automate the process of finding and executing arbitrage opportunities. This requires programming knowledge but can be highly profitable.

Broker Platforms

Many betting brokers offer platforms with built-in arbitrage tools that help you identify opportunities across multiple bookmakers and exchanges.

Arbitrage Software

Dedicated arbitrage software can monitor odds in real-time, calculate potential profits, and even execute trades automatically when opportunities arise.

Bankroll Management Tools

Proper bankroll management is crucial for arbitrage trading. Tools that help you track your profits, manage your stakes, and monitor your overall performance are essential.

Advanced Arbitrage Strategies

Lay-to-Back Arbitrage

Lay-to-back arbitrage involves laying a selection at higher odds before an event, then backing it at lower odds as the market moves in your favor. This strategy can be particularly effective in volatile markets.

Example:

Football match:

  1. Lay Team A at 2.20 before the match
  2. Team A scores an early goal, odds drop to 1.50
  3. Back Team A at 1.50
  4. Lock in a profit regardless of the final result

This strategy requires good timing and an understanding of how odds move during an event.

Dutching

Dutching is a form of arbitrage where you back multiple selections to ensure a profit regardless of which one wins. It's particularly useful in markets with many possible outcomes.

Example:

Horse race with 10 runners:

  1. Identify the 3 horses with the best value odds
  2. Calculate stakes to ensure the same profit regardless of which horse wins
  3. Place the bets
  4. Profit if any of your selections win

Dutching requires careful calculation and can be more profitable than backing a single selection when the odds are favorable.

Scalping

Scalping involves making small, quick profits by taking advantage of small price movements. It's a form of arbitrage that requires very fast execution and is often automated.

Example:

Tennis match:

  1. Back Player A at 1.95
  2. Wait for odds to move to 1.93
  3. Lay Player A at 1.93
  4. Lock in a small profit
  5. Repeat as opportunities arise

Scalping requires excellent timing and often specialized software to execute trades quickly enough to capture small price movements.

Hedging

Hedging involves taking an opposing position to lock in a profit or minimize a loss. While not strictly arbitrage, it's a related strategy that can be used to secure profits.

Example:

You've backed Team A at 2.00 with $100:

  1. Team A is winning, and odds have dropped to 1.20
  2. Lay Team A at 1.20 for an appropriate stake
  3. Lock in a profit regardless of the final result

Hedging is particularly useful when your initial bet is in a strong position, and you want to secure profits rather than risk losing your potential winnings.

Tips for Successful Arbitrage Trading

Account Management

  • Maintain accounts with multiple exchanges and bookmakers
  • Keep sufficient funds in each account to act quickly
  • Consider using a broker to access restricted bookmakers
  • Monitor your account limits and avoid getting restricted

Execution Speed

  • Arbitrage opportunities can disappear in seconds
  • Use tools that help you identify opportunities quickly
  • Consider automation for faster execution
  • Have your stakes pre-calculated for common scenarios

Commission Considerations

  • Factor in commission rates when calculating profits
  • Different exchanges have different commission structures
  • Volume-based discounts can significantly impact profitability
  • Consider commission-free promotions when available

Bankroll Management

  • Start with a reasonable bankroll and scale up gradually
  • Don't risk your entire bankroll on a single arbitrage opportunity
  • Keep track of your profits and losses
  • Reinvest profits to compound your returns

Market Selection

  • Focus on liquid markets with tight spreads
  • Popular sports like football, tennis, and horse racing often offer the best opportunities
  • Consider less popular markets where inefficiencies are more likely
  • Be aware of market suspension times and rules

Risk Management

  • While arbitrage is theoretically risk-free, execution risks exist
  • Be prepared for odds to change before you can place both bets
  • Consider the risk of account restrictions if you're too successful
  • Diversify across different types of arbitrage strategies

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