Cascade autopsy: BTC, 2026-09-15 - $50.4M liquidated (n=5,284 tape events)

On 2026-09-15, our multi-venue tape recorded a BTC cascade: $50.4M in forced closes over 9 minutes (n=5,284 raw tape events in our own capture, not the whole market).

The liquidation map snapshot published 2 minutes before the start showed 29 levels; 9 were reached inside the cascade's traded range (n=29 levels, Wilson 95% lower bound 17%). Misses are shown at equal weight in the full autopsy.

The measured record as published that day: walk-forward precision 60.0% [Wilson 95% lower bound 36.4%], n=16 day-clusters.

Full re-verified anatomy (minute-by-minute timeline, before-map, venue breakdown): https://hunterkiller.io/autopsy/2026-09-15T1435-BTC

Descriptive record of a past event - not a forecast and not a trade signal.