Stock scanners for day trading that keep up with the first hour
A day trading scanner has one job: show you, within seconds, which stocks are doing something unusual for this minute of this session. Ours runs intraday scans for the open, the first hour, the midday and the close, and connects every match to alerts, watchlists and your trading journal.
A day trading scanner for each part of the session
The market behaves differently at 9:31 ET than at 13:00 ET, and a single static list cannot serve both. We split the day into scan presets you can copy and edit.
- 9:30 to 9:45 ET, the open. Gappers breaking or failing the premarket high, with relative volume above 5x and spread filters to avoid the widest names.
- 9:45 to 10:30 ET, the first hour. New intraday highs on names that were already in play, and fresh movers from the momentum scanner with change in 5 minutes above 3%.
- 10:30 to 14:00 ET, midday. Fewer, cleaner setups. Many traders tighten RVOL to 3x and price to above $5 or switch the scanner off and review.
- 14:00 to 16:00 ET, the afternoon. High-of-day breaks and VWAP reclaims on names that held their gains.
Why the first hour gets its own scan
The first 60 minutes carry a large share of the day's volume in most small and mid cap movers, and the range is widest when liquidity is still forming. That is where most intraday scanners earn their keep, and also where they hurt traders who chase every row. Our first-hour preset sorts by relative volume rather than percent change, because a stock up 25% on light volume is a different trade from one up 12% on 8x its normal volume for 9:50 ET.
Intraday scanner filters that matter for day trades
Day trading filters differ from swing trading filters. You care about whether the stock can be traded in and out cleanly today, not where it closes next month.
- Price between $2 and $20 is a common momentum range. Above $20 you need more capital per share, below $2 spreads and halts become a bigger risk.
- Float under 20M shares tends to move faster and reverse faster. Under 50M is a wider net.
- Relative volume above 2x tells you the stock is being noticed. Above 5x usually means news or a halt.
- Change % from the prior close, and change in the last 1 and 5 minutes for speed.
- ATR, to compare today's range with a normal day and size your stop.
- Volume since the open, so a scan does not show names with 20,000 shares traded.
Halts are part of the scan, not a surprise
Small caps that move fast get halted under the limit up limit down mechanism, often several times in a morning. The scanner shows halts and resumptions as they happen, with the halt price. If you hold a position into a halt, you cannot exit until it resumes, and the reopen can be far from where it stopped. Knowing a name has already halted twice changes how you size the next entry.
Turn a scan into a short list, then into alerts
Watching a fast list for hours wears you down and leads to impulse trades. A calmer approach is to let the scan feed a day trading watchlist, mark your levels, and set trading alerts on the premarket high, the VWAP cross or an RVOL threshold. You get a browser notification, email or push when your condition hits and you look at the chart then, not every 30 seconds.
The journal remembers what the scan saw
When you take a trade from a scan, the journal entry stores the scan state at entry: gap, RVOL, float, price, time of day. Weeks later you can filter your own trades and see whether entries taken before 9:45 ET pay better or worse than entries after 10:00 ET, or whether trades on floats above 50M are dragging your average R down. That is the feedback loop most stock scanners for day trading leave to a spreadsheet.
Past performance and backtests do not guarantee future results. Trading involves substantial risk of loss.
Test a scan rule before you trust it
On Pro you can run a simple backtesting software check on an entry rule from your scan, such as a premarket high break with RVOL above 3x, with a stop, a target and a time exit, on up to 5 years of intraday history. Treat the result as a sanity check, not a forecast. Slippage, partial fills and halts are messier in live trading than in any test.
FAQ
-
What is the best time to run a day trading scanner
The scanner runs continuously from 4:00 ET to 16:00 ET, and to 20:00 ET on Pro. Most day traders focus on the premarket from 7:00 ET and the first hour after the 9:30 ET open, but the right window depends on your own rules and your journal results.
-
Can I run several intraday scans at once
Yes. You can keep several saved scans open side by side, for instance gappers, first-hour momentum and halts, each with its own filters and alerts.
-
Does it work on a laptop
Yes. It runs in a web browser, so one laptop screen is enough. Alerts reach you by browser notification, email or push, so you do not need six monitors.
-
Will the scanner make me profitable
No tool can promise that. The scanner finds stocks that match your filters. Results depend on your rules, execution and risk management. Nothing here is investment advice.