VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Wednesday, December 3, 2025

Tool Comparison

ChartMill vs FlowAlgo comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

ChartMill adds Screeners, Stock Ideas, Watchlist, News, Calendar, Data Visualizations, Scores, Financials, Insider Data, Analyst Recommendations, Analyst Price Targets, Analyst Forecasts, and Position Sizing coverage that FlowAlgo skips.

FlowAlgo includes Options & Derivatives, and Dark Pool & Off-Exchange categories that ChartMill omits.

ChartMill has a free tier, while FlowAlgo requires a paid plan.

In depth comparison

ChartMill

chartmill.com

Hands-on review

A web-based research suite combining stock/ETF screeners, charts, ratings, watchlists, and trading ideas. ChartMill supports server-side email alerts, custom screeners with advanced filters, and both technical and fundamental data. Analyst estimates and some premium data require a paid subscription. U.S. pre-market and after-hours coverage includes NYSE, NASDAQ, and AMEX.

Platforms

Web

Pricing

FreeSubscription

Quick highlights

Technical and fundamental screener for stocks and ETFs, with interactive charts, ratings, watchlists, and trading ideas.
Pre-market and after-hours movers screener for U.S. markets (NYSE, NASDAQ, AMEX).
Ability to create custom expressions and filters in the screener for advanced screening logic.
Historical screener mode allows users to run any screen as of a past date.
Server-side email alerts for price moves, setups, earnings, news, insider activity, fundamentals, analyst ratings, and saved screens (alerts are delayed, not real-time).

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FlowAlgo

flowalgo.com

Realtime options order flow with equity block and dark pool data. All plans include the same feature set with monthly, quarterly, or annual billing. Paid trial available for two weeks. Dark pool prints are reported with delays (anywhere from hours to the next day), and equity block data can lag by up to ~20 minutes under exchange rules.

Platforms

Web

Pricing

Subscription

Quick highlights

Realtime monitoring of options order flow, with unusual activity detection and tracking of Intermarket Sweep Orders and option block trades.
Equity block and dark pool order data, paired with a dedicated “Dark Pool Insights” module.
Dark pool data is delayed until officially reported; equity block data may lag ~20 minutes. Options flow itself streams with typical latency of half a second to 15 seconds.
Alpha AI signals during market hours, flagging predictive momentum shifts and Long/Short/Hedge opportunities.
Historical database with access back to mid-2017, including prior days’ flow activity.

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Where they differ

ChartMill

Distinct strengths include:

Screeners Stock Ideas Watchlist News Calendar Data Visualizations Scores Financials

Technical and fundamental screener for stocks and ETFs, with interactive charts, ratings, watchlists, and trading ideas.
Pre-market and after-hours movers screener for U.S. markets (NYSE, NASDAQ, AMEX).
Ability to create custom expressions and filters in the screener for advanced screening logic.
Historical screener mode allows users to run any screen as of a past date.

FlowAlgo

Distinct strengths include:

Options & Derivatives Dark Pool & Off-Exchange

Realtime monitoring of options order flow, with unusual activity detection and tracking of Intermarket Sweep Orders and option block trades.
Equity block and dark pool order data, paired with a dedicated “Dark Pool Insights” module.
Dark pool data is delayed until officially reported; equity block data may lag ~20 minutes. Options flow itself streams with typical latency of half a second to 15 seconds.
Alpha AI signals during market hours, flagging predictive momentum shifts and Long/Short/Hedge opportunities.

Feature-by-feature breakdown

Attribute	ChartMill	FlowAlgo
Categories Which research workflows each platform targets	Shared: Alerts Unique: Screeners, Stock Ideas, Watchlist, News, Calendar, Data Visualizations, Scores, Financials, Insider Data, Analyst Recommendations, Analyst Price Targets, Analyst Forecasts, Position Sizing	Shared: Alerts Unique: Options & Derivatives, Dark Pool & Off-Exchange
Asset types Supported asset classes and universes	Stocks, ETFs	Stocks, ETFs, Options
Experience levels Who each product is built for	Beginner, Intermediate, Advanced	Beginner, Intermediate, Advanced
Platforms Where you can access the product	Web	Web
Pricing High-level pricing models	Free, Subscription	Subscription
Key features Core capabilities called out by each vendor	Unique Technical and fundamental screener for stocks and ETFs, with interactive charts, ratings, watchlists, and trading ideas. Pre-market and after-hours movers screener for U.S. markets (NYSE, NASDAQ, AMEX). Ability to create custom expressions and filters in the screener for advanced screening logic. Historical screener mode allows users to run any screen as of a past date. Server-side email alerts for price moves, setups, earnings, news, insider activity, fundamentals, analyst ratings, and saved screens (alerts are delayed, not real-time). Interactive stock charts with multiple indicators (RSI, MACD, etc.), saved chart configurations, and multi-symbol view.	Unique Realtime monitoring of options order flow, with unusual activity detection and tracking of Intermarket Sweep Orders and option block trades. Equity block and dark pool order data, paired with a dedicated “Dark Pool Insights” module. Dark pool data is delayed until officially reported; equity block data may lag ~20 minutes. Options flow itself streams with typical latency of half a second to 15 seconds. Alpha AI signals during market hours, flagging predictive momentum shifts and Long/Short/Hedge opportunities. Historical database with access back to mid-2017, including prior days’ flow activity. FlowAlgo Levels (“Institutional Zones”), highlighting support and resistance from historical block and dark pool transactions.
Tested Verified by hands-on testing inside Find My Moat	Yes	Not yet
Editor pick Featured inside curated shortlists	Standard listing	Standard listing

Frequently Asked Questions

Which workflows do ChartMill and FlowAlgo both support?

Both platforms cover Alerts workflows, so you can research those use cases in either tool before digging into the feature differences below.

Which tool offers a free plan?

ChartMill offers a free entry point, while FlowAlgo requires a paid subscription. Review the pricing table to see how the paid tiers compare.

How can you access ChartMill and FlowAlgo?

Both ChartMill and FlowAlgo prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

ChartMill differentiates itself with Technical and fundamental screener for stocks and ETFs, with interactive charts, ratings, watchlists, and trading ideas., Pre-market and after-hours movers screener for U.S. markets (NYSE, NASDAQ, AMEX)., and Ability to create custom expressions and filters in the screener for advanced screening logic., whereas FlowAlgo stands out for Realtime monitoring of options order flow, with unusual activity detection and tracking of Intermarket Sweep Orders and option block trades., Equity block and dark pool order data, paired with a dedicated “Dark Pool Insights” module., and Dark pool data is delayed until officially reported; equity block data may lag ~20 minutes. Options flow itself streams with typical latency of half a second to 15 seconds..

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