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The outcome (the BTC price used to resolve a round) comes from Binance market data via the aggregate trades API.

How the outcome is built

  1. The system takes the last executed trade price that occurs at or immediately before the configured reference time (UTC) for that round.
  2. That price is rounded to two decimal places (USD terms) to produce the final outcome used for errors, winners, and payouts.

Data sources

Last modified on July 27, 2026