Which market and which closing hour?
This page uses US cash equities and the NYSE core session as its reference. NYSE lists normal core trading from 09:30 to 16:00 ET and a closing auction at 16:00. Futures, options, foreign exchanges, and continuously traded crypto require their own session definitions. An opening range breakout measures activity after an open; a London breakout uses a different market window. Neither supplies evidence for this closing-hour hypothesis.
- Verify the calendar for every test year. Do not apply the two listed 2026 dates to other years.
- For a five-minute chart, the normal window contains bars opening at 15:00 through 15:55. A bar opening at 16:00 belongs outside this window.
- A halt or missing feed bars can leave an incomplete window. Do not relabel the final 12 available bars as the final hour.
| Calendar case | Scheduled close in New York | Final-hour window |
|---|---|---|
| Normal US equity trading day | 16:00 | 15:00 to 16:00 |
| NYSE early close: November 27, 2026 | 13:00 | 12:00 to 13:00 |
| NYSE early close: December 24, 2026 | 13:00 | 12:00 to 13:00 |
| Exchange holiday | No regular session | No observation |