A name that stopped out could be bought right back the same session — observed
live: APWC stopped out -904 in the morning, was re-entered, and lost another
-645. The backout cooldown only covered UNFILLED entries; a filled position that
exits had no re-entry guard.
Track names leaving the broker's held set (a closed round-trip) and bench them
from re-entry for the rest of the session, on both the slow approval path and
the fast trigger. Detection runs every guard pass (before the armed early-return)
off fresh broker truth; emits a reentry_block risk event. Toggle with
TRADING_BLOCK_REENTRY_AFTER_EXIT (default on).
Tests: re-entry blocked on both paths after a position closes; 40 pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
