Polymarket$3.08BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$380.07MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$24.19MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
As of March 18, 2026, the Polymarket odds for Bitcoin price on March 18? are: 74,000-76,000: 53%, 72,000-74,000: 39%, 76,000-78,000: 5%, 70,000-72,000: 3%. These probabilities are derived from real-money trading and update in real time.
Bitcoin price on March 18? is currently available on Polymarket. Check PredictMarketCap for cross-platform availability as new markets are added regularly.
Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.
