The Brier Index
Data

The record, as data

Forecasts made before the outcome, proven with Bitcoin, graded after. Misses included.

Every official BTC forecast since Oct 7, 2026, how it resolved, and its grade. Each day since Oct 22, 2026 comes with its Bitcoin timestamp.

All of it is free. Link to us when you quote it.

Questions about the data: andres@brierindex.com.

The data describes risk and how past forecasts did. It is not a recommendation to buy, sell or hold anything, and it does not say which way the price will go.