How can I track the probability?

IBKR Prediction Markets offers a chart to view market pricing changes over time for a given election question — effectively a real-time election prediction signal derived from trading activity. IBKR Prediction Markets surfaces these probabilities through Event Contract prices and percentage-style displays based on market sentiment.

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How do I trade event contracts?
What are US election prediction markets?
How do markets estimate the probability of an economic outcome?
Can I move between IBKR Prediction Markets and other IBKR trading platforms?