The firm rolls its day at 22:00 UTC; our trade date at 5 PM CT. In summer
they coincide, in winter the firm's rolls an hour earlier. New entries are
already kept out of that hour, but a take-profit or stop that fills in it
was booked to the day before. firmDayOf labels the firm's day the way
currentTradeDateCT labels ours, and the sync's transfer window now starts
at the firm day behind today's trade date.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>