OBA · RVOL vs 30-day average · as of 2026-10-23 close
relative volume
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⚠ End-of-day data — this compares the last full session’s volume to the trailing average, not live intraday RVOL. Real-time intraday relative volume is on the roadmap. RVOL ≥ 2-3× often flags a stock in play; ≥ 5× is extreme.
OBA volume and dollar volume by period
Each period’s average session against the average session in the 252 sessions (one trading year) before it, so a period is never compared with itself. The year row is compared with the year before it.
| Period | Sessions | Shares | Dollar volume (est.) | Per session | vs average session before |
|---|
| Latest session 1 session | Oct 23 | 118 | $1K | 118 $1K | 0.00× −100% avg 62K · $628K, Aug 15, 2025 – Oct 22, 2026 |
| Last week 5 sessions | Oct 9 – Oct 23 | 48K | $496K | 10K $99K | 0.15× −85% avg 64K · $640K, Aug 15, 2025 – Sep 30, 2026 |
| Last month 21 sessions | Aug 25 – Oct 23 | 807K | $8.3M | 38K $397K | 0.59× −41% avg 65K · $656K, Aug 15, 2025 – Aug 24, 2026 |
| Last year 252 sessions | A full year is 252 sessions; we hold 167 sessions since 2025-08-15. |
- The multiple compares shares a session, so a price move does not count as extra trading. A week is the last 5 sessions, a month 21 and a year 252.
- Dollar volume is estimated: each session’s shares times its close, added up. Daily bars carry no average traded price, so the true value differs a little.
- OBA’s volume is spiky: its average session over the 166 sessions before the latest (62K shares) is 6.2 times its median session (10K), lifted by a few very heavy days. Against that average, an ordinary day reads far below it.
- Volume is the consolidated total across US exchanges, end of day, through Oct 23, 2026 (Databento).