Chart and changes show stored historical probabilities, not the selected live book.
Trends
Selected row: book midpoint. Other rows: stored references, possibly normalized; 24h changes use stored history.
Venue terms
Source: Polymarket
Informational venue terms only; CoinRithm paper trading uses its own rules.
Market depth · Ostapenko vs. Bencic: Set 1 Games O/U 8.5 — Over
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Related Markets
Related questions for context, not a comparison of equivalent contracts.
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Rules
This market refers to the tennis match between the named outcome and Belinda Bencic in the Ningbo Open, originally scheduled for October 18, 2026 at 10:00PM ET.
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/wta-ostapen-bencic-2026-10-18AI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+29 more outcomes