BearScout: Get Brier-scored against real prediction markets - free

BearScout is a free forecasting game: make probability calls on real prediction-market questions, get Brier-scored against the market's ask price at call time, climb a pseudonymous leaderboard. No real money — just find out if your judgment is signal or noise.

I built BearScout because I kept meeting people (including past me) who "knew" they were good at predicting things but had never kept score. The mechanic: pick a real prediction-market question, lock in your probability, and when it settles you get a Brier score - benchmarked against the market's ask price at the moment you called, not just the outcome. Matching the market = 0 credit. You only score by justifiably disagreeing with the crowd and being right. Deliberately no real money anywhere: no deposits, no payouts. It's calibration training, not trading. (We also shipped a free Brier score & calibration calculator: trader-bear.com/tools/brier-calculator) Two things I'd love feedback on: (1) how we handle thin order books where "the price" is ambiguous, (2) what question categories you'd want beyond our current curated pool.

How does the Brier scoring actually work if the market price keeps moving after I make a call — am I scored against the price at the exact moment I submit, or the final resolution?