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Roundup8 min read

Best Premarket Scanners in 2026: Trade Ideas, Scanz, MOMO Pro and Four More Compared

Seven premarket scanners side by side: which plan carries the scanner, what it costs as of 2026-11-02, when its premarket coverage starts, and its limits.

Updated By the Signal8 team
On this page
  1. Tools at a glance
  2. The short version
  3. How the scanners compare
  4. The scanners, A to Z
  5. Where Signal8 is weaker
  6. How to read a premarket board
  7. FAQ
  8. Sources and dates checked

Tools at a glance

A to Z. Prices are from each vendor's own pricing page on the date shown, and vendors change them often.

The short version

A premarket scanner answers one question before the open: which stocks are moving on unusual volume, and why. The tools below answer it from different ends. Some stream every new high as it prints; some rank a list of gappers you refresh; some start from the headline.

Three things separate them more than the feature lists suggest:

  1. Which plan carries the scanner. On several of these tools the entry price does not include it.
  2. When premarket coverage starts. Most list 4:00 a.m. ET; some do not say on their pricing page.
  3. What sits next to the gap. Price and RVOL are on every board. News, halts and SEC-filing context are not.

Below are seven tools in alphabetical order, with what each charges as of 2026-11-02 and what its own site says about premarket. This page also answers the common "Scanz vs Trade Ideas" and "MOMO Pro vs Trade Ideas" questions in the FAQ. For float definitions specifically, see our low-float scanner roundup, which this page does not repeat.

How the scanners compare

Every competitor fact below comes from the vendor's own site on 2026-11-02. "Not listed" means we did not find it on the pages we checked that day, not that the tool lacks it.

ScannerPlan that carries the scanner, billed monthlyPremarket coverage per its siteFree option
Benzinga ProEssential, $197Not listed on its pricing page14-day free trial
FinvizElite, $39.50Elite: premarket data from 4 AM until 9:30 AMYes, delayed screener
MOMO ProPro, $27; Gap Scanner on Pro+, $47Full trading hours, 4am to 8pm ETSeven-day trial, payment method required
ScanzStarter, $89 (one scan at a time)Premarket and after-hours scanning on every plan7-day trial, card required
Signal8We make thisFree account; custom filters on Pro, $594:00 to 9:30am ET, switching session on its ownYes, real-time presets after sign-in
Trade IdeasStandard, $127Gap (%) filter includes premarket gappersFree account, live access for a limited time
TradingViewBasic, freeExtended-hours filters, columns and tabYes, Basic plan
ScannerStreaming or custom alertsNews next to the scanSEC filing context
Benzinga ProYes, watchlist alerts from BasicYes, its core productNot listed on its pricing page
FinvizYes, unlimited on EliteNot listed on the Elite pageNot listed on the Elite page
MOMO ProYes, high/low alerts on Pro; advanced alerts on Pro+Yes, real-time stock newsNot listed on its plans page
ScanzYes, unlimited on Pro ($199)Yes, news scansYes, SEC Filing scans
Signal8We make thisRadar alerts on Pro; saved scans sound while the scanner is openYes, filings and press releasesYes: dilution, cash runway, ATM, going concern and delisting flags (Pro)
Trade IdeasYes, real-time streaming alertsNot listed on its pricing pageNot listed on its pricing page
TradingViewYes, price and technical alerts by planNot listed on the screener pages we checkedNot listed on the screener pages we checked

The scanners, A to Z

Benzinga Pro

Best fora newsfeed with a scanner on its top plan

Visit Benzinga Pro(opens in a new tab)
Price ·
  • Essential $197/mo
  • Basic from $37/mo without the scanner

Benzinga Pro is sold on its newsfeed, with audio squawk from the Streamlined plan up. The Real-Time Scanner is listed only under Essential, at $197 a month billed monthly or $166.42 a month billed yearly, as of 2026-11-02. Basic, at $37 a month, adds real-time Nasdaq Basic quotes and the full newsfeed but not the scanner. Streamlined, at $147, adds a newsfeed you can filter by price, volume and float. There is a 14-day free trial. Its pricing page does not state premarket hours. The full plan breakdown is in Trade Ideas vs Benzinga Pro.

Finviz

Best fora low-cost screener with 4 AM premarket data

Visit Finviz(opens in a new tab)
Price ·
  • Free (delayed)
  • Elite $39.50/mo or $299.50/yr

Finviz's free screener is delayed and refreshes every 3 minutes. Elite is real-time with a 10-second refresh, and its page lists "premarket data from 4 AM until 9:30 AM" and aftermarket data from 4:00 PM until 8:00 PM. Elite also adds unlimited screener alerts that fire when new stocks match your filters. It costs $39.50 a month or $299.50 a year as of 2026-11-02, with refunds on written request during the first 30 days.

MOMO Pro

Best forhigh-of-day streams from 4am ET at a low price

Visit MOMO Pro(opens in a new tab)
Price ·
  • Pro $27, Pro+ $47, Ultra $67 per month

MOMO Pro, from Mometic, runs in a browser or as an installable web app and lists "Full Trading Hours (4am–8pm ET)" on every plan. The $27 Pro plan centres on a real-time high/low scanner that streams new highs and lows, with unlimited high/low alerts, a halt and resume bar and real-time news. Pro+, at $47, adds the Gap Scanner, a relative-volume scanner, an 18+ parameter screen builder and advanced alerts. Ultra, at $67, adds its Aura AI tools and keyword news triggers. Yearly prices are $225, $395 and $560, as of 2026-11-02. Paid plans have a seven-day trial that needs a payment method.

Scanz

Best fordata, news and SEC-filing scans side by side

Visit Scanz(opens in a new tab)
Price ·
  • $89, $199 or $999 per month

Scanz's pricing FAQ says it "includes premarket and after-hours scanning across the full feature set", with 65+ scan filters and real-time data and news on all plans. Each plan covers Nasdaq, NYSE, AMEX and OTC, and saves data, signal, news and SEC Filing scans. Starter, at $89 a month, runs one scan at a time. Pro, at $199, runs unlimited scans at once and adds unlimited alerts. Ultra is $999 a month through sales. Prices are as of 2026-11-02, with a 7-day trial on Starter and Pro that needs a card.

Signal8

We make this

Best forfiling and dilution flags next to each gapper

See Signal8 Pro
Price ·
  • Free account
  • Pro $59/mo or $588/yr

Signal8 makes this one. Its scanner runs premarket from 4:00 to 9:30am ET, ranking each stock by its gap from the previous close, then switches to the regular session and after hours on its own. Logged out the board is delayed 5 minutes; a free account makes the presets real time. Presets include Gap Up, Momentum, Volume No Move, Low Float, Squeeze, High Dilution, Catalyst, Halted and Delist Watch.

Signal8 Pro, at $59 a month or $588 a year, adds custom filters on price, change, RVOL, volume, float and market cap, and filters read from SEC filings: dilution risk, cash runway, ATMs, going concern and delisting notices. A saved scan alerts with a sound while the scanner is open. Radar is a separate board that fires premarket alerts from 5am ET when a stock meets its rules; today's alerts are live on Pro and not shown without it. Past sessions are free to view.

Trade Ideas

Best fordeep custom scans, streaming alerts and backtesting

Visit Trade Ideas(opens in a new tab)
Price ·
  • $127/mo or $1,068/yr
  • Premium $254/mo

Trade Ideas' premarket page says the Gap (%) filter "includes premarket gappers", that Top Lists update every 15 seconds, and that Pre-market Highs and Pre-market Lows streaming alerts fire each time a stock sets a new premarket extreme. Top Lists run in the Web Dashboard; the streaming alerts run in TI Pro, its Windows desktop app. TI Standard is $127 a month or $1,068 a year and includes Channel Bar scans, Top Lists, real-time streaming alerts, a Formula Editor and an AI Assistant. TI Premium, at $254 a month or $2,136 a year, adds Holly AI signals, OddsMaker backtesting and auto trading, as of 2026-11-02.

TradingView

Best forpremarket columns for traders who chart there

Visit TradingView(opens in a new tab)
Price ·
  • Free Basic
  • Essential from $12.95/mo billed yearly

TradingView's help center lists extended-hours filters and columns in its stock screener, plus an Extended Hours tab, with the data available only during an extended session. It publishes its Pre-market Gap % formula: the premarket open minus the previous regular-session close, divided by that close. The Basic plan is free. Paid plans run from $12.95 a month (Essential) to $199.95 a month (Ultimate), billed annually, as of 2026-11-02, and its pricing page says real-time data for exchanges such as NASDAQ and NYSE is added separately on a paid plan.

Where Signal8 is weaker

  • No streaming alert engine of the Trade Ideas or MOMO kind. Signal8's saved scans alert only while the scanner is open in your browser; Trade Ideas and MOMO list streaming alerts, and Scanz Pro lists unlimited alerts.
  • No backtesting or auto trading. Trade Ideas Premium lists both. Signal8 offers neither.
  • Fewer scan conditions. Trade Ideas, Scanz and MOMO Pro+ let you build scans from many more parameters. Signal8's custom filters are a shorter list focused on movement, float, volume and filing data.
  • No audio squawk or desktop app. Benzinga Pro has squawk; Trade Ideas has a Windows app. Signal8 runs in the browser and its mobile app.
  • Radar's live board needs Pro. Without Pro, today's alerts are not shown; past sessions are free in full.

How to read a premarket board

Whatever tool you use, three habits help:

  • Check the gap's base. A gap is measured from the previous regular-session close. Signal8 and TradingView both document that basis; ask any tool you use which close it uses.
  • Read RVOL against the same time of day. Premarket volume is thin, so a full-day average makes every early mover look quiet. Premarket RVOL explains the calculation.
  • Look for the halt and the filing. A stock gapping on an offering, a reverse split or a pending halt moves for a different reason than one gapping on earnings. Trading halts explained covers the codes, and the premarket scanner guide walks through Signal8's columns.

FAQ

Scanz vs Trade Ideas: what is the difference?

Both are scan-first tools with real-time data. As of 2026-11-02 Scanz starts at $89 a month for one scan at a time, and $199 for unlimited simultaneous scans and alerts; it adds news and SEC Filing scans on every plan. Trade Ideas starts at $127 a month with streaming alerts and Top Lists, and its $254 Premium plan adds Holly AI signals and OddsMaker backtesting. Trade Ideas' streaming alerts run in its Windows app; Scanz lists web, mobile and, on Pro, desktop.

MOMO Pro vs Trade Ideas: which costs less?

MOMO Pro costs less on paper. As of 2026-11-02 its plans are $27, $47 and $67 a month, or $225, $395 and $560 a year, and its Gap Scanner is on the $47 Pro+ plan. Trade Ideas is $127 a month for Standard and $254 for Premium. They are built differently: MOMO centres on a stream of new highs and lows in the browser, while Trade Ideas offers custom scans, Top Lists, streaming alerts and, on Premium, backtesting.

What time do premarket scanners start?

US premarket trading runs from 4:00 a.m. to 9:30 a.m. ET. MOMO Pro and Finviz Elite both state 4 AM on their sites, and Signal8's scanner switches into premarket at 4:00 a.m. ET. Trade Ideas' premarket page says its filters work as soon as premarket trading starts showing up, and adds that most traders use the list in the last hour before 9:30. Early volume is thin, so the first hour of any board is sparse.

Is there a free premarket scanner?

Yes, with limits. TradingView's free Basic plan includes the stock screener with its extended-hours columns. Finviz's free screener is delayed and refreshes every 3 minutes; its 4 AM premarket data is listed under Elite. Signal8's scanner is free and real time after sign-in, with custom and filing-based filters on Pro. Trade Ideas, Scanz and MOMO Pro offer trials rather than a free plan, as of 2026-11-02.

Sources and dates checked

Each vendor below was checked on its own website on the date shown.

  • https://www.benzinga.com/pro/pricing checked 2026-11-02: monthly Basic $37, Streamlined $147, Essential $197; annual Basic $30.58/mo, Streamlined $124.75/mo, Essential $166.42/mo; Real-Time Scanner listed under Essential; Streamlined lists Advanced Newsfeed filterable by Price, Volume, Float and Audio Squawk (Equity); 14-day free trial (read via EXA web_fetch, direct requests got HTTP 403)
  • https://finviz.com/elite checked 2026-11-02: Elite $39.50/month or $299.50/year; free quotes delayed; Elite real-time, premarket data from 4 AM until 9:30 AM and aftermarket data from 4:00 PM until 8:00 PM; screener auto-refresh 3 min free vs 10 s Elite; stock, price, screener, portfolio and calendar alerts not included on free, unlimited on Elite; refunds on written request within the initial 30 days
  • https://mometic.com/momo-plans.html checked 2026-11-02: MOMO Pro $27/month or $225/year, Pro+ $47/month or $395/year, Pro Ultra $67/month or $560/year; Full Trading Hours (4am-8pm ET); Pro lists Real-time High/Low Scanner, Unlimited High/Low Stock Alerts, Real-time Halt/Resume Bar, Real-time Stock News; Pro+ adds Discovery Screener, 18+ Parameter Screen Builder, MOMO Flow Relative Volume Scanner, Gap Scanner, Unlimited Advanced Alerts; Ultra adds Aura AI Trade Advisor and Keyword News Filtering & Triggers; seven-day trial for paid plans, valid payment method required; runs in a modern browser or as a Progressive Web App
  • https://scanz.com/pricing/ checked 2026-11-02: Starter $89/month (run 1 scan at a time), Pro $199/month (run unlimited scans at the same time, create unlimited Alerts), Ultra $999/month via Contact us; Nasdaq, NYSE, AMEX and OTC; saved Data, Signal, News and SEC Filing scans; all plans include 100% real-time data and news; FAQ: includes premarket and after-hours scanning across the full feature set, 65+ scan filters; 7-day free trial on Starter and Pro, credit card required
  • https://www.trade-ideas.com/pricing/ checked 2026-11-02: TI Standard $127/month billed monthly or $1,068 a year billed yearly; TI Premium $254/month or $2,136 a year; Standard lists Channel Bar scans and Top Lists, real-time streaming alerts, Formula Editor and AI Assistant; Premium adds Holly AI signals, OddsMaker backtesting and auto trading; Windows app or Web Dashboard; free account with live access for a limited time
  • https://www.trade-ideas.com/premarket-scanner/ checked 2026-11-02: the Gap (%) filter includes premarket gappers; Top Lists update every 15 seconds; Pre-market Highs (HPRE) and Pre-market Lows (LPRE) streaming alerts; Top Lists run in the Web Dashboard, streaming alerts run in TI Pro, the Windows desktop app
  • https://www.tradingview.com/pricing/ checked 2026-11-02: Basic $0; Essential $12.95/mo, Plus $29.95/mo, Premium $59.95/mo, Ultimate $199.95/mo, all billed annually; extra real-time data for exchanges including NASDAQ and NYSE available to be added separately with a paid plan or trial
  • https://www.tradingview.com/support/solutions/43000502613-how-to-see-the-pre-market-post-market-data-in-the-screener/ checked 2026-11-02: extended hours filters and columns and an Extended Hours tab in the Screener; data available only during an extended session
  • https://www.tradingview.com/support/solutions/43000635852-how-are-the-most-popular-filters-connected-with-change-calculated/ checked 2026-11-02: Pre-market Gap % = (open of the pre-market minus previous regular-session close) / previous regular-session close x 100
  • Signal8 scanner signal8.ai/scanner checked 2026-11-02 logged out: presets include Top Movers, Momentum, Volume No Move, Low Float, Squeeze, High Dilution, Catalyst, Earnings, Halted, Delist Watch; Delayed 5 min, log in to see real-time; Dilution and Flags columns marked Pro
  • Signal8 repo frontend/lib/scanner/scanner-guide.ts checked 2026-11-02: premarket 4:00 to 9:30am ET ranks the gap from the previous close; regular session to 4:00pm; after-hours to 8:00pm; Runners reads Gap Up before the open
  • Signal8 repo frontend/app/(dashboard)/pro/pricing-capabilities.tsx checked 2026-11-02: Pro Scanner custom filters on price, change, RVOL, volume, float and market cap; Pro filters for dilution risk, cash runway, ATMs, going concern and delisting notices; saved scans alert with a sound while the scanner is open
  • Signal8 radar signal8.ai/radar checked 2026-11-02: alerts from 5am ET on US trading days; today's alerts live with Signal8 Pro and not shown without it (the board behind the Pro panel is sample data); previous sessions shown in full for free
  • Signal8 public-config api.signal8.ai/api/v1/features/public-config read 2026-11-02: radar, premarket_scanner, scanner_v3 and screener_dilution_filters on; scanner_screen_alerts off
  • Signal8 /pro page checked 2026-11-02: Signal8 Pro $59/mo or $588/yr

Check it on a live ticker

Compare the numbers yourself on Signal8

Every figure in a Signal8 dilution snapshot links to the filing sentence it came from, and anything we could not measure says so instead of showing zero. Start with the scanner.

Open the scannerSee Signal8 Pro

Also on Signal8:Radar premarket alertsSignal8 Pro

Terms in this article

Relative volume (RVOL)
Relative volume (RVOL) is a stock's trading volume divided by its typical volume for the same period, so a reading of 3.0 means three times the usual activity.

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Signal8 is not a broker-dealer or investment adviser. This article compares software tools; nothing here is a recommendation to buy or sell any security.