AllTradingTools

Stock Screeners and Real-Time Scanners

A screener filters the whole market down to the handful of stocks that fit your rules, such as valuation, growth, chart pattern or volume. A scanner does the same job continuously during the trading day, surfacing stocks as they break out, gap or trade unusual volume.

  • 44 screeners and scanners listed
  • 34 free or with a free tier
  • Reviewed

All screeners and scanners

44 screeners and scanners

Referral links appear first by default. How we order listings

  • TradingView (opens tradingview.com in a new tab)

    tradingview.com
    Free + paid plans

    A browser-based charting and social-trading platform covering stocks, futures, forex, and crypto with hundreds of built-in indicators and a large library of community-written scripts in its Pine Script language. The free tier is usable on its own, while paid plans add more chart layouts, alerts, and server-side data. Suits traders who want deep charting without installing software.

    Best for: Traders who want one chart everywhere, free or paid

    • custom indicators
    • multi-timeframe
    • alerts
    • social scripts
    • screener
    From $12.95/mo Web · Desktop · iOS · Android

  • Finviz (opens finviz.com in a new tab)

    finviz.com
    Free + paid plans

    Finviz is a widely used stock screener pairing fundamental, technical, and pattern-based filters with a fast, visual interface including heat maps and a news feed. The free tier covers most screening needs on a short delay, while Elite adds real-time quotes, extended history, alerts, and exports. It suits traders wanting a quick way to scan the market.

    Best for: Traders wanting a fast, all-purpose screener

    • custom filters
    • heat maps
    • technical patterns
    • alerts
    • real-time data
    From $39.50/mo Web

  • Trade Ideas (opens trade-ideas.com in a new tab)

    trade-ideas.com
    Paid, free trial

    Trade Ideas is an AI-driven real-time scanner that monitors thousands of US stocks simultaneously and surfaces momentum, gap, and pattern-based setups as they develop. Its Holly AI engine backtests and ranks strategies automatically, and the platform offers both web and desktop clients with direct broker integration for fast order execution. It is built for active intraday and swing traders.

    Best for: Active day traders wanting AI-driven real-time scans

    • real-time scanning
    • ai signals
    • custom alerts
    • broker integration
    • backtesting
    Web · Desktop

  • Benzinga Pro (opens benzinga.com in a new tab)

    benzinga.com
    Paid, free trial

    Benzinga Pro pairs a real-time news squawk and headline feed with a customizable scanner for price, volume, float, relative volume, and short interest, plus preset strategies like premarket gainers and five-minute movers. It is best known for speed on breaking-news-driven moves rather than deep fundamental screening. Traders use it to react quickly to catalysts during the session.

    Best for: News- and catalyst-driven day traders

    • real-time scanning
    • news alerts
    • premarket movers
    • custom filters
    • squawk audio
    From $37/mo Web · iOS · Android

  • Barchart (opens barchart.com in a new tab)

    barchart.com
    Free + paid plans

    Barchart offers free and subscription stock, ETF, and options screeners alongside its widely cited market data, charts, and options tools. Filters cover price, technicals, fundamentals, and options metrics like implied volatility and unusual activity, with fuller result sets and exports on paid plans. It suits traders who already use Barchart for quotes and want screening in the same place.

    Best for: Traders who want screening bundled with market data

    • custom filters
    • options screener
    • watchlists
    • price alerts
    • data export
    From $8.25/mo Web · iOS · Android

  • StockCharts.com (opens stockcharts.com in a new tab)

    stockcharts.com
    Free + paid plans

    A long-running web charting service built around its SharpCharts and ACP charting engines, with a wide range of chart types, overlays, and classic technical indicators plus editorial commentary from well-known chartists. A free public chart viewer is available, with paid plans adding saved charts, more indicators, and scanning. Suits price-action and classic technical analysts.

    Best for: Classic technical analysts who like editorial market commentary

    • classic indicators
    • multi-timeframe
    • scanning
    • alerts
    • chart annotations
    From $19.95/mo Web · iOS · Android

  • ChartMill (opens chartmill.com in a new tab)

    chartmill.com
    Free + paid plans

    ChartMill is a stock screener built around more than 180 filters plus proprietary fundamental, technical, and setup ratings that recalculate daily. It covers US, Canadian, and European exchanges and includes alerts on price, earnings, news, and saved screens. The free tier is limited, with full filter access and history requiring a paid plan.

    Best for: Swing traders blending fundamentals and technicals

    • custom filters
    • fundamental ratings
    • technical ratings
    • alerts
    • preset screens
    From $34.97/mo Web

  • Scanz (opens scanz.com in a new tab)

    scanz.com
    Paid, free trial

    Scanz is a real-time scanning platform for active day traders, monitoring tens of thousands of stocks across Nasdaq, NYSE, AMEX, and OTC with customizable data, signal, and news-based scans. Paid tiers add unlimited saved scans, alerts, desktop layouts, and multi-monitor support. It is aimed at traders who need speed and depth rather than a casual free tool.

    Best for: Active day traders needing fast real-time scans

    • real-time scanning
    • custom filters
    • news scans
    • multi-monitor
    • alerts
    From $89/mo Web · Desktop

  • StocksToTrade (opens stockstotrade.com in a new tab)

    stockstotrade.com
    Paid, free trial

    StocksToTrade is an all-in-one trading platform bundling stock scanners for day and swing setups, charting, watchlists, Level 2 data, and broker connections, with a particular following among small-cap and penny-stock traders. It also bundles educational content and community access alongside the scanning tools. It is priced and sold as a full platform rather than a standalone screener.

    Best for: Small-cap and penny-stock day traders

    • real-time scanning
    • level 2 data
    • custom filters
    • watchlists
    • broker integration
    Web · Desktop

  • MarketInOut (opens marketinout.com in a new tab)

    marketinout.com
    Free + paid plans

    MarketInOut is a stock screener and backtester covering more than 40 global exchanges, with technical, fundamental, and formula-based filters plus an AI feature that turns plain-language descriptions into screens. Strategies can be tested against more than 25 years of historical data before being used live. A free tier and trial are available alongside paid membership options.

    Best for: Traders wanting screening with built-in backtesting

    • custom filters
    • formula screener
    • backtesting
    • technical scans
    • ai screening
    Web

  • Zacks Research Wizard (opens zacksrw.com in a new tab)

    zacksrw.com
    Paid, free trial

    Research Wizard is Zacks' desktop-caliber screening and backtesting tool, giving access to more than 650 fundamental and earnings-estimate data items across over 10,000 stocks. It ships with dozens of pre-built strategies and lets users backtest custom screens against 17-plus years of history before trading them. A two-week free trial is offered with no credit card required.

    Best for: Fundamentals-driven screeners who want backtesting

    • custom filters
    • backtesting
    • preset strategies
    • earnings estimates
    • fundamental data
    Web · Desktop

  • StockFetcher (opens stockfetcher.com in a new tab)

    stockfetcher.com
    Paid, free trial

    StockFetcher is a long-running technical screener that lets traders write scans in plain-English phrases instead of complex formula builders, covering more than 125 indicators like RSI, MACD, and moving-average crossovers. It includes watchlists, basic charting, and an active user forum for sharing filter ideas. It is a lighter-weight, budget-friendly option compared to real-time scanning platforms.

    Best for: Traders who want simple, text-based technical scans

    • custom filters
    • plain-english syntax
    • technical indicators
    • watchlists
    • community filters
    Web

  • Yahoo Finance Screener (opens finance.yahoo.com in a new tab)

    finance.yahoo.com
    Free

    Yahoo Finance's free stock screener covers more than 150 filtering criteria across 50 regions, including price, valuation, and key financial metrics, with no login required for basic use. It is simpler than dedicated trading platforms but is one of the most accessible screeners for casual and beginner investors already using Yahoo Finance. Some advanced research sits behind a Gold subscription.

    Best for: Beginners wanting a free, no-frills screener

    • custom filters
    • preset screens
    • fundamental data
    • no login required
    Web · iOS · Android

  • Investing.com (opens investing.com in a new tab)

    investing.com
    Free + paid plans

    Global markets news and data site covering stocks, forex, commodities and crypto, with an economic calendar and real-time quotes alongside its headlines. Popular with forex and futures traders for its calendar and broad international coverage. A free tier covers news, with InvestingPro adding deeper analysis.

    Best for: Forex and futures traders who want news tied to an economic calendar

    • economic calendar
    • breaking news
    • real-time quotes
    • global coverage
    Web · iOS · Android

  • Stock Analysis (opens stockanalysis.com in a new tab)

    stockanalysis.com
    Free + paid plans

    Clean, fast site for looking up company financial statements, ratios, valuation multiples and stock screeners, with most core data available for free. A common quick-reference tool for pulling a company's revenue, margin and valuation history without hunting through filings. A Pro tier adds export tools and extra history.

    Best for: Investors who want a fast, mostly free financial data lookup

    • financial statements
    • valuation multiples
    • stock screener
    • fast lookups
    Web

  • Koyfin (opens koyfin.com in a new tab)

    koyfin.com
    Free + paid plans

    Terminal-style research platform giving retail investors deep historical financial data, a screener covering thousands of filters across global securities, and charts that overlay fundamentals directly on price. Positioned as an affordable alternative to institutional terminals for building custom dashboards. Free tier is usable; paid plans add more data and exports.

    Best for: Investors who want a terminal-style dashboard without terminal pricing

    • custom dashboards
    • fundamentals overlay
    • global screener
    • financial data history
    Web

  • GuruFocus (opens gurufocus.com in a new tab)

    gurufocus.com
    Free + paid plans

    Value-investing research platform that tracks the public portfolio filings of well-known fund managers and pairs that data with valuation tools like its GF Value estimate and financial strength ratings. Aimed at fundamental and value investors who study what prominent investors are buying. Free data is limited; Premium unlocks full guru holdings.

    Best for: Value investors who follow prominent fund managers' holdings

    • guru portfolio tracking
    • gf value estimate
    • financial strength ratings
    • 13f filings
    Web

  • Simply Wall St (opens simplywall.st in a new tab)

    simplywall.st
    Free + paid plans

    Visual research platform that turns fundamental data into a one-page infographic covering valuation, past performance, financial health and future growth for a given stock. Aimed at investors who want a quick visual read rather than a spreadsheet of ratios. Free snapshots are available, with a paid plan for full reports and alerts.

    Best for: Investors who prefer visual summaries over raw data tables

    • visual stock snapshots
    • valuation checks
    • portfolio narratives
    • ownership data
    Web · iOS · Android

  • Stock Rover (opens stockrover.com in a new tab)

    stockrover.com
    Free + paid plans

    Web-based research and screening platform with deep fundamental data, customizable scorecards and portfolio-level analytics for US and Canadian stocks. Popular with dividend-growth and value investors for its ratio comparisons across large watchlists. A limited free plan is available, with Premium and Premium Plus adding more data and screens.

    Best for: Value and dividend-growth investors screening large watchlists

    • custom scorecards
    • fundamental screener
    • portfolio analytics
    • ratio comparisons
    Web

  • Portfolio123 (opens portfolio123.com in a new tab)

    portfolio123.com
    Free + paid plans

    Portfolio123 is a quantitative research platform where the stock screener is one part of a system that also builds ranking models and backtests trading rules against 20 years of US, Canadian, and European data. It suits investors comfortable testing rules-based strategies rather than casual browsing. A free plan exists, with screening and backtesting tiers priced separately.

    Best for: Quant-minded traders building rules-based screens

    • custom filters
    • backtesting
    • ranking systems
    • machine learning
    • rules-based strategies
    From $25/mo Web

  • Market Chameleon (opens marketchameleon.com in a new tab)

    marketchameleon.com
    Free + paid plans

    Market Chameleon offers deep options analytics including implied volatility rankings, unusual options volume reports, earnings implied-move data and screeners for spreads, straddles and other strategies, alongside stock movers and an economic calendar. Operating since 2007, it appeals to traders who want research-grade options data in one place.

    Best for: Traders wanting deep IV and earnings-move research in one tool

    • iv rank
    • options screener
    • earnings moves
    • unusual volume
    From $19.99/mo Web

  • Danelfin (opens danelfin.com in a new tab)

    danelfin.com
    Free + paid plans

    Danelfin is an AI stock-scoring and screening tool that ranks stocks and ETFs on a 1-10 "AI Score" derived from machine-learning models trained on hundreds of fundamental, technical, and sentiment signals. Traders filter and sort by these scores to build idea lists rather than run traditional multi-criteria screens. The free plan is capped at 10 stock reports per month.

    Best for: Traders wanting AI-ranked stock ideas

    • ai scoring
    • custom filters
    • sentiment signals
    • portfolio ideas
    From $29/mo Web

  • Tickeron (opens tickeron.com in a new tab)

    tickeron.com
    Free + paid plans

    An AI-driven platform that generates and backtests trading 'robots' across stocks, options, ETFs, crypto and forex, pairing them with pattern-recognition screening tools. Traders can follow the historical performance of each AI-generated robot before choosing to act on its signals. Suits traders who want algorithmically generated, pre-backtested trade ideas rather than building their own strategy code.

    Best for: Traders who want AI-generated and backtested trading robots

    • ai trading robots
    • pattern recognition
    • screener
    • backtested signal history
    Web · iOS · Android

  • SwingTradeBot (opens swingtradebot.com in a new tab)

    swingtradebot.com
    Free + paid plans

    SwingTradeBot is a lightweight technical screener for NYSE, Nasdaq, and AMEX stocks that flags breakouts, moving-average crosses, and other swing-trading setups. A free-forever tier covers the core scans and one watchlist, while paid plans add more customization and additional scan lists. It is a simple, low-cost option rather than a full professional platform.

    Best for: Swing traders wanting a simple, affordable scanner

    • technical scans
    • breakout alerts
    • watchlists
    • preset screens
    From $10/mo Web · iOS · Android

  • StockInvest.us (opens stockinvest.us in a new tab)

    stockinvest.us
    Free

    StockInvest.us provides free daily technical scores and short-term price forecasts across roughly 50,000 stocks on 48 exchanges, alongside basic screening by signal and score. Its forecast tool lets users compare their own bull or bear calls against a community consensus, building credits toward deeper multi-session forecasts. It is more of a technical-scoring and forecasting tool than a full-criteria screener.

    Best for: Traders wanting quick technical scores and forecasts

    • technical scoring
    • price forecasts
    • preset screens
    • community sentiment
    Web

  • OpenInsider (opens openinsider.com in a new tab)

    openinsider.com
    Free

    A free, no-signup screener of SEC Form 4 insider trading filings, built around fast tabular views and cluster-buy detection. Traders can filter by transaction size, insider role, and industry to spot notable executive purchases and sales as they are filed. It is widely used as a raw data source rather than a polished dashboard.

    Best for: Traders who want raw, fast insider-trade data without a paywall

    • form 4 filings
    • cluster buys
    • insider screener
    • no signup
    Web

  • TrendSpider (opens trendspider.com in a new tab)

    trendspider.com
    Paid, free trial

    A web-based technical analysis platform that automates chart work traders usually do by hand: it auto-draws trendlines, support and resistance, and Fibonacci levels, and can scan the market on those conditions. It also includes a no-code strategy backtester and multi-timeframe alerts. Best suited to swing and technical traders who want AI-assisted chart prep rather than manual drawing.

    Best for: Technical traders who want automated chart analysis

    • auto-trendlines
    • pattern recognition
    • multi-timeframe
    • backtesting
    • alerts
    Web

  • TC2000 (opens tc2000.com in a new tab)

    tc2000.com
    Free + paid plans

    A charting, scanning, and trading platform for US stocks and options that pairs fast server-side technical scans with an integrated brokerage, so a scan result can be charted and traded without switching tools. Runs on Windows, Mac, web, and Android. Suits active equity and options traders who value execution speed alongside charting.

    Best for: Active US equity and options traders who want scan-to-trade speed

    • custom indicators
    • server-side scans
    • options charting
    • alerts
    • paper trading
    From $24.99/mo Web · Desktop · Android

  • Quiver Quantitative (opens quiverquant.com in a new tab)

    quiverquant.com
    Free + paid plans

    An alternative-data hub tracking congressional trades, corporate insider activity, government contracts, lobbying, and other non-traditional signals like patent filings and app ratings. A free tier covers live congress and insider data, while a paid plan adds screeners, alerts, and backtested strategies. It is one of the broadest single sources for this kind of data.

    Best for: Traders who want one dashboard covering congress, insiders and other alt-data signals

    • congress trading
    • insider trading
    • government contracts
    • alerts
    • screener
    From $25/mo Web · API

  • MarketBeat Earnings Calendar (opens marketbeat.com in a new tab)

    marketbeat.com
    Free + paid plans

    A free earnings calendar covering thousands of US-listed companies with report dates, consensus estimates, and prior-quarter results, plus an earnings screener for filtering by sector, market cap, or surprise history. MarketBeat's paid All Access plan unlocks additional ratings and sentiment data layered on top of the same calendar.

    Best for: Screening upcoming earnings by sector or size

    • earnings calendar
    • earnings screener
    • consensus estimates
    • surprise history
    Web

  • AmiBroker (opens amibroker.com in a new tab)

    amibroker.com
    Paid

    A long-standing Windows desktop platform for charting, scanning and strategy backtesting using its own AFL scripting language. Traders can optimize and walk-forward test systems across large portfolios with fast, native performance. Suits technical traders who want a mature, purchase-once desktop backtester rather than a monthly cloud subscription.

    Best for: Technical traders who want a fast desktop backtester with its own scripting language

    • afl scripting language
    • portfolio backtesting
    • optimization
    • market scanning
    • charting
    From $299 one-time (Standard Edition) Desktop

  • Zacks (opens zacks.com in a new tab)

    zacks.com
    Free + paid plans

    Research platform built around the Zacks Rank, a proprietary system that ranks stocks primarily on trends in earnings estimate revisions, alongside sector research and screening tools. A long-running independent research shop separate from sell-side banks. Free rank data is limited; Zacks Premium unlocks full rankings and reports.

    Best for: Investors who trade around earnings estimate revisions

    • zacks rank
    • earnings estimate revisions
    • sector research
    • screener
    Web · iOS · Android

  • Dividend.com (opens dividend.com in a new tab)

    dividend.com
    Free + paid plans

    Dividend.com is a dividend research site built around its DARS ratings, which combine relative strength, yield attractiveness, dividend reliability, and dividend uptrend into a single score used to build sample income portfolios. It also offers a dividend screener and educational content on payout history. It suits income investors researching individual dividend stocks rather than tracking a live linked portfolio.

    Best for: Dividend stock research and screening

    • dividend ratings
    • stock screener
    • model portfolios
    • dividend calendar
    Web

  • ShortSqueeze.com (opens shortsqueeze.com in a new tab)

    shortsqueeze.com
    Free + paid plans

    A long-running short interest data site covering over 16,000 stocks across major US exchanges, with free basic short interest figures and days-to-cover ratios. Paid features add a short squeeze ranking, a dedicated screener, and squeeze alerts. The site is explicit that its data is for research rather than investment advice.

    Best for: Traders screening broadly for short squeeze candidates

    • short interest
    • days to cover
    • squeeze ranking
    • short screener
    Web

  • Ziggma (opens ziggma.com in a new tab)

    ziggma.com
    Free + paid plans

    Ziggma links brokerage accounts to track portfolio health, diversification, and dividends, and adds an AI-assisted portfolio optimizer that suggests steps to improve returns or reduce risk. It includes curated stock screens and impact analysis for investors who weigh environmental or social factors. It suits investors who want tracking paired with actionable improvement suggestions.

    Best for: Investors wanting AI-guided portfolio improvement suggestions

    • portfolio optimizer
    • stock screener
    • dividend tracking
    • risk analysis
    From $6.99/mo Web

  • InsiderScreener (opens insiderscreener.com in a new tab)

    insiderscreener.com
    Free + paid plans

    An insider-trading screener covering 16 global markets, aggregating filings directly from regulators and exchanges rather than a single feed. The free tier covers latest transactions and basic screeners, with premium adding real-time alerts, insider performance rankings, and cluster-activity signal detection. Its multi-market reach goes beyond most US-only trackers.

    Best for: Traders who want insider data across markets beyond just the US

    • insider screener
    • multi-market coverage
    • cluster activity signals
    • csv export
    Web

  • Roic.ai (opens roic.ai in a new tab)

    roic.ai
    Free + paid plans

    Financial data platform with up to 40 years of statements, pre-calculated ratios like ROIC and ROE, earnings transcripts and a value-oriented stock screener, delivered through a web app, spreadsheet add-in and API. Positioned as a lower-cost alternative to legacy financial data APIs. Free tier available with rate limits.

    Best for: Value investors and developers wanting cheap access to fundamental ratios

    • roic and roe ratios
    • earnings transcripts
    • value screener
    • spreadsheet add-in
    Web · API

  • Investor's Business Daily (opens investors.com in a new tab)

    investors.com
    Paid, free trial

    Publisher of stock-market news built around William O'Neil's CAN SLIM growth-investing method, including leaderboard stock lists, IBD Digital rankings and market-direction commentary. Combines daily news with proprietary ratings such as Composite Rating and Relative Strength. Subscription required beyond a limited free trial.

    Best for: Growth-stock swing traders following the CAN SLIM system

    • can slim ratings
    • leaderboard lists
    • market direction calls
    • relative strength
    Web · iOS · Android

  • Finbox (opens finbox.com in a new tab)

    finbox.com
    Free + paid plans

    Fundamental analysis toolbox with pre-built valuation models, a customizable screener covering roughly 100,000 stocks across 135-plus exchanges, and a large library of data points. Geared toward more advanced fundamental investors who want to build their own models rather than read pre-written reports. Free tier available, with paid plans for full models.

    Best for: Advanced fundamental investors who want to build their own valuation models

    • valuation models
    • global screener
    • custom data points
    • dcf templates
    Web · API

  • AltIndex (opens altindex.com in a new tab)

    altindex.com
    Free + paid plans

    An AI-driven alternative-data platform scoring stocks from signals such as Reddit buzz, web traffic, app downloads, hiring trends, and insider activity, in addition to a portfolio-scoring tool that reads a brokerage screenshot. It offers free ticker lookups and stock alerts, with paid tiers for the full AI agent and deeper history. Its AI stock-pick performance claims are self-reported.

    Best for: Traders who want multiple alt-data signals blended into a single score

    • alternative data score
    • reddit sentiment
    • web traffic signals
    • insider activity
    • ai stock alerts
    Web · iOS · Android

  • StockTitan (opens stocktitan.net in a new tab)

    stocktitan.net
    Free + paid plans

    AI-scored real-time news feed covering press releases, SEC filings and earnings for US-listed stocks, with each item tagged for likely price impact and sentiment. Includes a momentum scanner and customizable watchlists. Free tier carries a one-minute delay, with paid tiers unlocking real-time delivery and filters.

    Best for: Small-cap traders who want filings and news pre-scored by likely impact

    • ai sentiment scoring
    • sec filing alerts
    • momentum scanner
    • custom watchlists
    From $19.99/mo Web

  • BiopharmCatalyst FDA Calendar (opens biopharmcatalyst.com in a new tab)

    biopharmcatalyst.com
    Free + paid plans

    A calendar built specifically for biotech traders, tracking FDA decision dates, PDUFA dates, and advisory committee meetings that often move small-cap pharma stocks sharply. Basic catalyst dates are free to browse, while premium tools add deeper filtering and catalyst screening for active biotech traders.

    Best for: Biotech traders tracking FDA decision catalysts

    • pdufa dates
    • fda calendar
    • advisory committee dates
    • biotech catalysts
    Web

  • Stockopedia (opens stockopedia.com in a new tab)

    stockopedia.com
    Paid, free trial

    Quantitative research platform built around StockRanks, a rules-based score combining quality, value and momentum factors across more than 32,000 global stocks including US listings. Aimed at investors who want a purely data-driven signal rather than analyst commentary, with screening and portfolio tools attached. Free trial precedes paid subscription.

    Best for: Systematic investors who want a purely quantitative stock score

    • stockranks scoring
    • rules-based screening
    • portfolio analytics
    • global coverage
    Web

  • AAII (opens aaii.com in a new tab)

    aaii.com
    Free + paid plans

    A nonprofit founded in 1978, AAII combines investor education articles and guides with stock screens and model portfolios built around named strategies like Graham or Lynch. Core educational content and a basic membership tier are free, while its A+ Investor data tools sit behind a paid subscription.

    Best for: Individual investors who want research-backed education from an independent nonprofit

    • investor education
    • stock screens
    • model portfolios
    • local chapters
    • nonprofit
    Web

Buying guide

How to choose

Investors and swing traders are usually well served by a free or low-cost screener that runs on end-of-day data. Day traders need real-time scanning, which costs more because of exchange data fees and the computing required to watch thousands of tickers every second.

  1. Real-time or delayed

    Free tiers are normally delayed 15 to 20 minutes. That is fine for swing trades and useless for momentum day trading.

  2. Depth of filters

    Count the fundamental and technical criteria, and check whether you can write custom formulas or are limited to preset lists.

  3. Pre-market and after-hours

    Gap traders need scans that work from 4 a.m. Eastern. Many tools only scan regular hours.

  4. Alerts and export

    Look for alerts when a stock enters a scan, watchlist sync with your charting platform and CSV export.

Screeners & Scanners: common questions

What is the difference between a stock screener and a scanner?

A screener runs a search on demand, usually against end-of-day or delayed data, and suits research. A scanner runs continuously on live data and pushes new matches to you as they happen, which suits day trading.

Are free stock screeners good enough?

For investing and swing trading, yes. Free screeners cover most fundamental and technical filters. The limits are delayed data, fewer export and alert options, and advertising.

What do day traders scan for?

Common scans include pre-market gappers, stocks with high relative volume, new intraday highs, low-float stocks with news, and halts. Most real-time scanners ship with these as presets.

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A listing is not a recommendation. Descriptions are our own summary of what each site says it does. Prices and features change, so confirm them with the provider. Nothing here is investment advice. See the disclosure for how links on this site work.