Data Scanner

Real-time stock scanner with 65+ filters. Find stocks matching your exact criteria across price, volume, change, technicals, fundamentals, and more.

Overview

The Scanner is why traders choose Scanz. While most platforms make you hunt for opportunities, the Scanner brings them to you - updating every 500ms (twice per second) with stocks matching your exact criteria. Define what matters (price range, volume, momentum, float size, technical levels) and the Scanner surfaces every matching stock, instantly.

This guide walks you through mastering the Scanner, from understanding the interface to building sophisticated multi-filter scans that find exactly the setups you trade.

Understanding the Scanner Interface

When you open the Scanner, you’ll see three main areas working together:

The Sidebar lists your saved scans and prebuilt templates. Your custom scans appear under “My Scans” while Scanz provides ready-to-use prebuilts organized by category: Gainers, Losers, Most Liquid, Highs, and Lows. Each prebuilt category offers session variants (Pre-Market, Regular Hours, After Hours, Full Day) so you can quickly switch contexts throughout the trading day.

The Filter Bar runs horizontally across the top. This is where you build your scan logic - each filter appears as a chip showing the metric, session, operator, and value. Filters combine with AND logic: a stock must pass every filter to appear in results. There is no OR logic between filters - if you need OR conditions (e.g., stocks up 10% OR down 10%), create separate scans for each variation. You can show or hide the full filter bar using the “Show Filters” / “Hide Filters” toggle.

The Results Table displays every stock matching your criteria, updating in real-time. Click any column header to sort. Click any row to open that stock in QuickView for deeper analysis - chart, news, Level 2, and Time & Sales appear in a slide-out panel without losing your scan results.

Above the results, you’ll find additional controls: Markets (filter by exchange), Security Type (stocks vs ETFs), Watchlist (limit results to a specific watchlist), and the results count showing how many stocks currently match your criteria.

Trading Sessions

Every session-based filter requires you to specify which trading period to measure. This is fundamental to how the Scanner works - a stock’s “Volume” during pre-market is completely different from its regular hours volume.

Pre-Market (PM) covers 4:00 AM to 9:30 AM Eastern. This is where gapper scans shine. Use PM filters to find stocks moving significantly before most traders are watching. Volume thresholds should be lower here - 50,000-100,000 shares pre-market represents serious interest.

Regular Hours (RH) is the standard session from 9:30 AM to 4:00 PM Eastern. Most of your scanning will use RH filters. Volume expectations are higher, and price action is most reliable during this window.

After Hours (AH) runs from 4:00 PM to 8:00 PM Eastern. Use AH filters to catch earnings reactions and overnight developments. Liquidity drops significantly, so tighten your price requirements to avoid stocks with wide spreads.

Full Day (FD) combines all sessions into cumulative totals. Useful for seeing the complete picture of a stock’s daily activity, regardless of when it occurred.

When you add a session-based filter, you’ll see the session code (PM, RH, AH, or FD) displayed alongside the filter name - something like “Volume RH” or “Percent Change PM”.

Example Scans

These complete configurations demonstrate how filters work together. Each is ready to use - load it and start finding opportunities.

Pre-Market Gappers

What it finds: Stocks gapping up significantly before market open - potential momentum plays for the first hour.

Percent Change | PM greater than or equal to 10

Volume | PM greater than or equal to 100000

Last Price greater than or equal to 1

Last Price less than or equal to 20

When to use: 7:00 AM to 9:30 AM Eastern. Watch how gappers behave as the open approaches - those holding their levels often continue; those fading may reverse.

Variations: Add Float <= 20M for more volatile low-float gappers. Lower the percent change threshold to 5% on quiet market days.

Intraday Momentum

What it finds: Stocks with strong momentum during regular hours, confirmed by unusual volume.

Percent Change | RH greater than or equal to 5

Volume | RH greater than or equal to 500000

Relative Volume greater than or equal to 2

Last Price greater than or equal to 2

When to use: 9:45 AM to 3:30 PM Eastern. The Relative Volume filter is critical - it separates stocks moving on conviction from those drifting on light volume.

Variations: Increase RVOL to 3x or 5x for more extreme activity. Add VWAP comparison to find stocks holding above their institutional reference price.

Low Float Runners

What it finds: Small float stocks with volume and momentum - the explosive movers.

Float less than or equal to 15000000

Percent Change | FD greater than or equal to 10

Relative Volume greater than or equal to 3

Last Price greater than or equal to 1

Last Price less than or equal to 20

When to use: Any session. Low float stocks move fast when volume arrives - the limited supply means buying pressure moves price quickly. Higher risk, higher reward.

Warning: Low floats are volatile in both directions. The same dynamics that create 50% squeezes create 30% dumps. Size accordingly.

VWAP Reclaim

What it finds: Stocks pulling back to VWAP then bouncing - a classic institutional entry pattern.

Last Price greater than or equal to VWAP

Percent Change from High | RH less than or equal to -3

Percent Change | RH greater than or equal to 2

Volume | RH greater than or equal to 300000

When to use: Mid-morning through afternoon. VWAP acts as a magnet throughout the day - strong stocks often pull back to touch it before continuing higher. This scan catches that reclaim.

Unusual Volume Alert

What it finds: Stocks experiencing exceptional trading activity - something is happening.

Relative Volume greater than or equal to 5

Volume | FD greater than or equal to 500000

Last Price greater than or equal to 2

When to use: Continuous monitoring. When a stock trades at 5x+ its average volume, there’s usually a reason - news, institutional accumulation, or anticipation of an event. This scan catches unusual activity early, before the move is obvious.

Tips for Better Scanning

Start Specific, Then Broaden

Begin with restrictive filters. If you get zero results, systematically loosen one filter at a time until you find the right balance. It’s easier to relax constraints than to figure out which of 10 loose filters is returning junk.

Match Session to Strategy

Your filters should match when you’re trading:

Pre-market: Use PM filters, lower volume thresholds
First hour: Use RH filters, focus on gap and momentum continuation
Midday: Add stricter volume filters to ensure activity
Power hour: Same as midday but watch for end-of-day positioning
After-hours: Use AH filters, expect thin liquidity

Watch the Results Count

A scan returning 500+ stocks is too broad - you can’t possibly evaluate that many opportunities. Aim for 10-50 results by adding filters or tightening values. Quality over quantity.

Create Variations

Build multiple versions of your core scans for different market conditions:

“Gappers - Hot Market” (10%+ gap)
“Gappers - Quiet Market” (5%+ gap)
“Gappers - Low Float” (add float filter)

This lets you quickly adapt without rebuilding from scratch.

Combine Technical and Structural

The best scans blend technical filters (price, volume, momentum) with structural filters (float, market cap). A stock up 20% means different things depending on whether it has 5M float or 500M float.

Multiple Scans at Once

Scanz Web displays one scan per tab. If you want to view multiple scans simultaneously - say, a gapper scan and a momentum scan side by side - you’ll need Scanz Desktop. The desktop application supports custom layouts with multiple scanner panels, and you can save these layouts for multi-monitor setups.

What You Can’t Do with Scans

Scans cannot be paused or stopped. There is no pause button. A scan is either saved (and shows live results when you open it) or deleted. If you don’t want to see a scan’s results, simply switch to a different scan or close the tab. Your saved scans remain available in the sidebar whenever you want to return to them.

There is no scheduling. Scans run in real-time whenever you have them open. You cannot schedule a scan to run at specific times.

Troubleshooting

No results showing Your filters are too restrictive. Loosen values or remove filters one by one. Check that your session filters match the current market period - PM filters won’t show results at 2 PM.

Too many results Add more filters or tighten existing values. Every additional filter narrows results. Consider adding volume, price, or float constraints.

Results not updating Check the session clock in the top right - if markets are closed, data won’t change. Try refreshing the page if you suspect a connection issue.

Saved scan missing Ensure you clicked Save after making changes. Check both “My Scans” and verify you’re looking at the correct account.

Wrong session data Verify your filter session codes (PM/RH/AH/FD) match your intent. A scan built for regular hours won’t show meaningful data during pre-market.

The Scanner connects to everything else in Scanz:

Signals - Get alerted when stocks enter your scan criteria
News - View news filtered by stocks in your scan
Alerts - Set price alerts on stocks you’re watching
Watchlists - Save interesting stocks for continued monitoring
QuickView - Analyze any result with chart, L2, and news