54 chain-graded parity+ signals @$100: maker bid at their price fills 93%
within 60s, EV/signal +$17.45 vs taker +$12.86 (+36%) — fee removal +
no pay-up. No adverse-selection asymmetry at the 60s window (winners fill
92% vs losers 94%); mild asymmetry only in patient tails, so 60s-then-
cancel is the shape. Queue-position optimism stated: maker wins while real
priority >~68%; markout re-read stream will refine. Candidate execution
change behind mirror-exactly + pre-registration.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>