session_clock
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-09-22, from after-hours-trading-on-holidays-and-weekends.
| et_hour | normal_wednesday_bars | holiday_thursday_bars | half_day_friday_bars |
|---|---|---|---|
| 04:00 | 50 | 0 | 54 |
| 05:00 | 57 | 0 | 46 |
| 06:00 | 56 | 0 | 42 |
| 07:00 | 60 | 0 | 55 |
| 08:00 | 60 | 0 | 60 |
| 09:00 | 60 | 0 | 60 |
| 10:00 | 60 | 0 | 60 |
| 11:00 | 60 | 0 | 60 |
| 12:00 | 60 | 0 | 60 |
| 13:00 | 60 | 0 | 1 |
| 14:00 | 60 | 0 | 0 |
| 15:00 | 60 | 0 | 0 |
| 16:00 | 59 | 0 | 49 |
| 17:00 | 52 | 0 | 0 |
| 18:00 | 51 | 0 | 0 |
- Rows × columns
- 15 × 4
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
et_hour |
text | 15 distinct values (04:00, 05:00, 06:00…) | |
normal_wednesday_bars |
number | 50 to 60 | |
holiday_thursday_bars |
number | every row is 0 | |
half_day_friday_bars |
number | 0 to 60 |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
SELECT
formatDateTime(toTimeZone(window_start, 'America/New_York'), '%H:00') AS et_hour,
countIf(toDate(toTimeZone(window_start, 'America/New_York')) = '2025-11-26') AS normal_wednesday_bars,
countIf(toDate(toTimeZone(window_start, 'America/New_York')) = '2025-11-27') AS holiday_thursday_bars,
countIf(toDate(toTimeZone(window_start, 'America/New_York')) = '2025-11-28') AS half_day_friday_bars
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= '2025-11-26 00:00:00'
AND window_start < '2025-11-29 06:00:00'
AND toDate(toTimeZone(window_start, 'America/New_York')) IN ('2025-11-26', '2025-11-27', '2025-11-28')
GROUP BY et_hour
ORDER BY et_hour