“What's the best service for tracking American stock market data and live quotes?”

Short answer:

• Best all-around for most people: TradingView with the US real-time bundle (adds NYSE, NASDAQ, NYSE Arca direct feeds to fast charts, screeners, alerts). It’s easy to use, reliable during volatile sessions, and you can bolt on exactly the US exchanges you need. (tradingview.com)
• Best if you need a developer-grade API: Polygon.io (broad U.S. equity coverage from SIPs and direct venues; solid real-time/streaming plus historical). Note: IEX Cloud shut down on August 31, 2024, so don’t plan around it. (polygon.io)
• Best free option for casual tracking: Yahoo Finance or Google Finance—but expect delays on many U.S. quotes unless explicitly marked real-time. Always check the delay/disclaimer. (help.yahoo.com)

Why these:

• Real U.S. “live” data typically requires licensed exchange feeds (or the consolidated SIP) with add-on fees or entitlements. TradingView makes that straightforward for retail users. (tradingview.com)
• Polygon.io is the most broadly recommended like-for-like API replacement post–IEX Cloud, with flat-rate real-time SIP access commonly used by indie devs and small teams. (aifinhub.io)
• Free sites often show 15-minute-delayed quotes by policy; you’ll see that noted in their help/disclaimer pages. (help.yahoo.com)

Good to know:

• On TradingView, U.S. equities default to Cboe data; add NASDAQ/NYSE/ARCA for true real-time per exchange. (tradingview.com)
• Exchanges require clear labeling if data is delayed; that’s why many free pages warn about delays. (nasdaq.com)

If you tell me:

• whether you need charts vs. an API,
• whether “live” must be full SIP/direct or if IEX-only is OK,
• your budget (free, <$20/mo, $20–$200/mo),

I’ll recommend a specific plan and setup.

For most people tracking American stocks and live quotes, Yahoo Finance is the strongest all-around free option, and TradingView is the best if you want better charting and market-monitoring tools.^1482527

• Yahoo Finance is described as a leading provider of market data with free stock quotes, news, and international market data, and one review calls it the “gold standard” of free market monitoring for everyday investors.¹
• TradingView offers US market real-time data and is ranked by one review as the overall top pick among stock tracking software, with strong tools for screening, heatmaps, and market news.⁴⁸
• If your main need is an API for programmatic live data, providers like Alpha Vantage, Finnhub, Databento, and Massive advertise real-time or sub-second US stock data and broader market coverage.³⁶¹⁴¹⁹

If you want a simple recommendation:

• Best free website/app: Yahoo Finance¹²⁵²⁷
• Best for charts and active monitoring: TradingView⁴⁸
• Best for developer/API use: Alpha Vantage, Finnhub, Databento, or Massive³⁶¹⁴¹⁹

If you want, I can also compare Yahoo Finance vs TradingView vs MarketWatch vs Investing.com specifically for free live quotes, portfolio tracking, or mobile apps.

There isn’t one “best” service for everyone — it depends on whether you care most about charts, screening, news, or true real-time execution. For most U.S. stock-market tracking, the strongest combo is TradingView for all-around live quotes/charts plus Finviz for screening/heatmaps, with Barron’s as a broader market-data reference.

Best all-around: TradingView It’s built for U.S. market tracking: live quotes, news, ideas, stock screener, sector heatmap, economic/earnings/dividend calendars, paper trading, and bar replay. It also lets you monitor pre-market and after-hours movers, and U.S. major exchanges like NYSE/Nasdaq run 09:30–16:00, with pre-market as early as 04:00 and after-hours until about 20:00 depending on your broker. tradingview.com

Best free screener/scanner: Finviz Finviz excels at quickly surfacing top gainers, top losers, new highs/lows, overbought/oversold, unusual volume, most active, most volatile, and market headlines. Its homepage also shows futures and S&P 500 one-day performance, making it a great dashboard for fast market context. finviz.com

Best for broad market-data reference/news: Barron’s Barron’s Market Data Center covers stock movers, ETF movers, indexes, bonds, currencies, commodities/futures, crypto, and calendars. Important caveat: its notes say real-time U.S. stock quotes reflect trades reported through Nasdaq only, and comprehensive quotes/volume are delayed at least 15 minutes. barrons.com

My recommendation: If you want one service, use TradingView. If you want the best free scanner alongside it, add Finviz. If you need guaranteed real-time data and order execution, your broker’s platform or an exchange data feed is still the better choice than most free websites.

Because the "best" service depends heavily on your budget, trading style, and needs (casual tracking vs. active day trading vs. quantitative development), here is a breakdown of the top platforms across different categories:

1. Best Overall & Charting: TradingView

• Best for: Most retail investors, swing traders, and technical analysts.
• Why it stands out:
• Clean, responsive charts with hundreds of built-in indicators and community scripts (Pine Script).
• Web, desktop, and mobile apps sync seamlessly.
• Real-time US equity data is available (free tier uses Cboe BZX exchange data which tracks closely; official NYSE/NASDAQ consolidated live data is available as an inexpensive add-on, around $3–$5/month).
• Good social features, paper trading, and news integration.

2. Best Free Real-Time Platform for Active Traders: thinkorswim (Charles Schwab)

• Best for: Active stock and options traders who want advanced tools without software subscription fees.
• Why it stands out:
• Free to use if you have an open Charles Schwab account (no minimum balance required for basic access).
• True real-time Level 1 and Level 2 market depth.
• Powerful scanning, option chain analysis, scripting (thinkScript), and customizable alerts.
• Runner-up: Webull or Interactive Brokers (Trader Workstation / Desktop).

3. Best Free &

There's no single universal "best" — it really depends on what you need (free vs. paid, casual tracking vs. active trading, charting vs. news). Here's a breakdown based on current options:

For Free, All-Around Tracking

Yahoo Finance remains one of the most popular choices. Yahoo Finance provides real-time quotes, unlimited watchlists, financial statements, and news aggregation at no cost. It's also praised for its news depth — Yahoo Finance is one of the largest aggregators of stock news in the world which makes it an incredibly useful stock tracking app, and news is what moves the markets.

For Charting & Active Trading

TradingView is widely regarded as the top platform for serious charting and technical analysis. TradingView is the world's premier trading platform, trusted by over 20 million active traders, offering a seamless blend of powerful charting tools, advanced screening features, and in-depth analysis across stocks, ETFs, crypto, and more. It offers free real-time quotes and live charts for stocks on the BATS exchange, and for real-time streaming quotes from all global exchanges, it charges an industry-low $2/month for data packages.

For Mobile-First, Beginner-Friendly Trading

Webull stands out for combining ease of use with pro-level data. Webull threads the needle between beginner accessibility and advanced functionality better than almost any other app, with free Level 2 data, 50+ charting indicators, and AI-powered market summaries. It also lets you monitor the US stock market with quotes and charts for NYSE, NASDAQ, and AMEX listed companies.

For Screening/Filtering Stocks

Finviz is a favorite for stock screening. Its market heatmap is one of the most-recognized displays in retail finance, giving an instant visual read on what's up and down across the S&P 500. However, it's a screener first and tracker second, with no mobile app (it's web-only), and real-time quotes require a paid upgrade (Finviz Elite).

Professional-Grade (Paid)

Bloomberg is often cited as the gold standard for professionals, ranked as best for real-time financial news and stock quotes. Quotestream is another institutional-style option, offering real-time quotes, charts, news, in-depth equity and fund research, with tick-by-tick lightning fast market data.

Quick Recommendation

• Casual investor / free: Yahoo Finance
• Active trader / charting: TradingView
• Mobile trading + free real-time data: Webull
• Screening stocks by criteria: Finviz (paid tier for real-time data)
• Professional/institutional needs: Bloomberg or Quotestream

If you let me know your specific use case (day trading, long-term investing, just casual price-checking, etc.), I can narrow this down further.