VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, October 19, 2025

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Head-to-head

ChartMill vs Prospero.ai comparison

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

Quick takeaways

ChartMill adds News, Calendar, Financials, Insider Data, Analyst Recommendations, Analyst Price Targets, Analyst Forecasts, and Position Sizing coverage that Prospero.ai skips.

Prospero.ai includes ETF Screeners, Options & Derivatives, Market Sentiment, Dark Pool & Off-Exchange, Education, Blogs, and Newsletters categories that ChartMill omits.

ChartMill 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)., and Ability to create custom expressions and filters in the screener for advanced screening logic..

Prospero.ai is known for: Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity)., Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation)., and Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term)..

Prospero.ai offers mobile access, which ChartMill skips.

ChartMill logo

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

Free
Subscription

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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Prospero.ai logo

Prospero.ai

prospero.ai

Mobile-first AI signals app for U.S. stocks & ETFs. Offers 10 proprietary signals (5 short-term: Net Options Sentiment, Net Social Sentiment, Net Institutional Flow, Dark Pool, Short Pressure; 5 long-term: Upside/Downside Breakout, Profitability, Growth, Market Similarity), plus a Daily Screener, ‘Our Picks’, watchlists, and notifications. No broker sync, public API, or advanced options greeks/IV surfaces are documented.

Platforms

Mobile

Pricing

Free

Quick highlights

  • Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
  • Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
  • Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
  • Mobile apps on iOS and Android with watchlists and in‑app notifications.
  • Education hub with plain‑English signal docs plus investing/trading newsletters (Substack).

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Overlap

Shared focus areas

6 overlaps

Mutual strengths include Screeners, Stock Ideas, and Watchlist plus 3 more areas.

Where they differ

ChartMill

Distinct strengths include:

News
Calendar
Financials
Insider Data
Analyst Recommendations
Analyst Price Targets
Analyst Forecasts
Position Sizing
  • 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.

Prospero.ai

Distinct strengths include:

ETF Screeners
Options & Derivatives
Market Sentiment
Dark Pool & Off-Exchange
Education
Blogs
Newsletters
  • Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
  • Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
  • Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
  • Mobile apps on iOS and Android with watchlists and in‑app notifications.

Feature-by-feature breakdown

AttributeChartMillProspero.ai
Categories

Which research workflows each platform targets

Shared: Screeners, Stock Ideas, Watchlist, Alerts, Data Visualizations, Scores

Unique: News, Calendar, Financials, Insider Data, Analyst Recommendations, Analyst Price Targets, Analyst Forecasts, Position Sizing

Shared: Screeners, Stock Ideas, Watchlist, Alerts, Data Visualizations, Scores

Unique: ETF Screeners, Options & Derivatives, Market Sentiment, Dark Pool & Off-Exchange, Education, Blogs, Newsletters

Asset types

Supported asset classes and universes

Stocks, ETFs

Stocks, ETFs

Experience levels

Who each product is built for

Beginner, Intermediate, Advanced

Beginner, Intermediate

Platforms

Where you can access the product

Web

Mobile

Pricing

High-level pricing models

Free, Subscription

Free

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

  • Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity).
  • Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation).
  • Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term).
  • Mobile apps on iOS and Android with watchlists and in‑app notifications.
  • Education hub with plain‑English signal docs plus investing/trading newsletters (Substack).
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 Prospero.ai both support?

Both platforms cover Screeners, Stock Ideas, Watchlist, Alerts, Data Visualizations, and Scores workflows, so you can research those use cases in either tool before digging into the feature differences below.

Do ChartMill and Prospero.ai require subscriptions?

Both ChartMill and Prospero.ai keep freemium access with optional paid upgrades, so you can trial each platform before committing.

Which tool has mobile access?

Prospero.ai ships a dedicated mobile experience, while ChartMill focuses on web or desktop access.

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 Prospero.ai stands out for Ten proprietary signals: 5 short-term (Options/Social/Institutional/Dark Pool/Short Pressure) and 5 long-term (Upside/Downside Breakout, Profitability, Growth, Market Similarity)., Short-term Net Options Sentiment updates ~every 2–5 minutes (real‑time orientation)., and Daily Screener & ‘Our Picks’ lists to surface candidates quickly for different horizons (long/short, short‑term/long‑term)..

Keep exploring

Stay on top of related tools

Browse the categories and profiles that overlap most with this comparison to round out your shortlist.

Recommended tools

These profiles share overlapping coverage with both sides of this matchup.

Curation & Accuracy

This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).

Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.