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 · Jim Diodati
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Related questions for context, not a comparison of equivalent contracts.
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Rules
The 2026 Niagara Falls, Ontario mayoral election is currently scheduled to be held on October 26, 2026.
Free JSON for this market, no API key needed:
https://api.coinrithm.com/api/prediction-markets/events/polymarket/niagara-falls-mayoral-election-winnerAI agents: call pm_data_event on the CoinRithm MCP server:
https://mcp.coinrithm.com/mcp+49 more outcomes
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