Unusual volume radar for US stocks
After the close, see which stocks suddenly traded heavy volume, and why.
Only the real outliers
Volume of at least 2.5× the median of the previous 20 trading days, a market cap of $2B or more, and enough liquidity.
Every one explained
AI finds the reason in 8-K filings, earnings and news, and lists its evidence.
Ten minutes after the close
The scan runs at 4:10 p.m. Eastern and updates twice more in the evening.
FAQ
How is the volume ratio worked out?
Volume ratio = the day's volume ÷ the median volume of the previous 20 trading days. The median, not the average, so one unusual day doesn't skew it.
Does it list both gainers and decliners?
Yes, stocks that rose and fell on heavy volume are listed separately.
Can I share a result?
Yes, each stock can be exported as a share image.
More tools, all in one membership
Company Research
Everything skilled investors check — the business, the balance sheet, management and valuation — on one page for any company.
AI daily brief
Every morning, the news on the companies and industries you follow, every sentence sourced.
Earnings calendar
When the companies you follow, and the big ones, report next, on one monthly calendar.
SEC filings search
US 10-Ks and 10-Qs, Hong Kong and China A-share reports: search, download, ask AI.
Rule of 40
One chart of the US stocks that balance growth and profitability.
Research every company like an owner
- Company research
- Moat analysis
- Industry chain
- News
- Market radar
- Volume radar
- + 6 more tools