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Use the Multi-Odds Value Analyzer by BetDiamonds to calculate implied probabilities and bookmaker margin from 2-way or 3-way betting odds. Instantly assess market fairness and spot overpriced lines.

Multi-Odds Value Analyzer | Calculate Market Margin from 2-Way or 3-Way Odds

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  <title>Multi-Odds Value Analyzer | BetDiamonds</title>
  <style>
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  </style>
</head>
<body>
  <div class="container">
    <h1>📊 Multi-Odds Value Analyzer</h1>

    <div class="card">
      <form id="oddsForm">
        <label for="marketType">Market Type</label>
        <select id="marketType">
          <option value="2">2 Outcomes (e.g. Over/Under)</option>
          <option value="3">3 Outcomes (e.g. 1X2)</option>
        </select>

        <div id="oddsInputs">
          <label for="odds1">Option 1 Odds</label>
          <input type="number" id="odds1" step="0.01" min="1" required placeholder="e.g. 1.85" />
          
          <label for="odds2">Option 2 Odds</label>
          <input type="number" id="odds2" step="0.01" min="1" required placeholder="e.g. 2.10" />
        </div>

        <button type="submit">Analyze Value</button>
      </form>
    </div>

    <div id="resultBox"></div>
  </div>

  <script>
    const marketType = document.getElementById('marketType');
    const oddsInputs = document.getElementById('oddsInputs');
    const resultBox = document.getElementById('resultBox');

    // Initialize form
    updateOddsInputs();

    marketType.addEventListener('change', updateOddsInputs);

    function updateOddsInputs() {
      const type = marketType.value;
      oddsInputs.innerHTML = `
        <label for="odds1">Option 1 Odds</label>
        <input type="number" id="odds1" step="0.01" min="1" required placeholder="e.g. 1.85" />
        
        <label for="odds2">Option 2 Odds</label>
        <input type="number" id="odds2" step="0.01" min="1" required placeholder="e.g. 2.10" />
        ${type === "3" ? `
        <label for="odds3">Option 3 Odds</label>
        <input type="number" id="odds3" step="0.01" min="1" required placeholder="e.g. 3.50" />
        ` : ''}
      `;
    }

    document.getElementById('oddsForm').addEventListener('submit', function (e) {
      e.preventDefault();

      const type = marketType.value;
      const odds1 = parseFloat(document.getElementById('odds1').value);
      const odds2 = parseFloat(document.getElementById('odds2').value);
      const odds3 = type === "3" ? parseFloat(document.getElementById('odds3').value) : null;

      // Validate inputs
      if (!odds1 || !odds2 || (type === "3" && !odds3) || 
          odds1 < 1 || odds2 < 1 || (type === "3" && odds3 < 1)) {
        showResult(`
          <div class="result-item danger">
            <div class="result-label">Error</div>
            <div class="result-value">Please enter valid odds (≥ 1.00) for all options</div>
          </div>
        `);
        return;
      }

      // Calculate implied probabilities
      const implied1 = 100 / odds1;
      const implied2 = 100 / odds2;
      const implied3 = odds3 ? 100 / odds3 : 0;

      const total = implied1 + implied2 + implied3;
      const margin = (total - 100).toFixed(2);

      // Determine margin severity
      let marginClass = "positive";
      let summaryClass = "good-summary";
      let summaryText = "✅ Fair market. Odds are relatively sharp.";
      
      if (margin > 5 && margin <= 10) {
        marginClass = "warning";
        summaryClass = "warning-summary";
        summaryText = "⚠️ Moderate bookmaker margin. Odds may be slightly overpriced.";
      } else if (margin > 10) {
        marginClass = "danger";
        summaryClass = "danger-summary";
        summaryText = "❌ High bookmaker margin. Odds are likely overpriced.";
      }

      // Build results
      let result = `
        <div class="result-item">
          <div class="result-label">Option 1 Implied Probability</div>
          <div class="result-value">${implied1.toFixed(2)}%</div>
        </div>
        
        <div class="result-item">
          <div class="result-label">Option 2 Implied Probability</div>
          <div class="result-value">${implied2.toFixed(2)}%</div>
        </div>
      `;

      if (type === "3") {
        result += `
          <div class="result-item">
            <div class="result-label">Option 3 Implied Probability</div>
            <div class="result-value">${implied3.toFixed(2)}%</div>
          </div>
        `;
      }

      result += `
        <div class="result-item">
          <div class="result-label">Total Market Margin</div>
          <div class="result-value ${marginClass}">${margin}%</div>
        </div>
        
        <div class="summary ${summaryClass}">
          ${summaryText}
        </div>
      `;

      showResult(result);
    });

    function showResult(content) {
      resultBox.innerHTML = content;
      resultBox.style.display = 'block';
      resultBox.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
    }
  </script>
</body>
</html>