ClusterSignal.io
Automated detection of insider buying clusters. Every opportunity scored across 5 dimensions and delivered to your inbox the moment it's detected.
Automated detection of insider buying clusters. Every opportunity scored across 5 dimensions and delivered to your inbox the moment it's detected.
This page is designed to help you find out whether ClusterSignal.io is good and if it is the right choice for you.
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Insider cluster detection
Scans every SEC Form 4 (US) and SEDI (Canada) filing and flags when 2 or more insiders — CEO, CFO, directors — buy their own company's stock within 21 days. Duplicate filings are removed and company-arranged share sales (placements) are flagged, so you only see genuine open-market buying.
A score out of 10 for every cluster
Each cluster is scored automatically across five dimensions: insider signal, technical analysis, financial health, analyst sentiment and market context. Only clusters scoring above 6.5 are sent, with the full breakdown so you can see why.
Instant alerts + public track record
A detailed report by email and a push notification the moment a cluster is detected. Every past alert and its measured outcome is published on a public results page, so you can judge the track record yourself.
Sell alerts
When insiders start selling a stock you were alerted to buy, you get a sell alert pointing back to the original buy alert, so you know when the people inside the company change their minds.
Personal watchlist
Add up to 10 stocks you already own. If a cluster of insiders sells one of them, you get a private alert, just for you, never broadcast to other members.
Plain-language guide + mobile app
Every indicator in the reports (RSI, P/E, free cash flow…) is explained simply in a built-in guide, with a seasonal calendar of when insiders can and can't trade. Installable as a mobile app with push notifications.
It focuses on one specific, well-documented pattern: several insiders at the same company buying their own stock within a short window, rather than every individual trade. Each cluster is then scored out of 10 across five dimensions (insider signal, technicals, financial health, analyst sentiment, market context), and company-arranged share sales are flagged so they aren't mistaken for conviction. It also covers Canadian SEDI filings, not just the US, and publishes every past alert's outcome on a public results page.
Screeners like OpenInsider or Finviz show you raw filings and leave the sorting to you. ClusterSignal does that work: it groups the filings into clusters, removes duplicates and placements, scores each one, and only alerts you when a cluster scores above 6.5, by email and push, with a plain-language breakdown of why. And its track record is public, so you can judge it before paying.
Self-directed individual investors in the US and Canada who do their own research and want to know when company insiders are putting their own money in, without scanning hundreds of filings a week. It's built for people who use data to inform their own decisions, not for people looking for someone to tell them what to buy.
Python (data pipeline and scoring engine), PostgreSQL via Supabase, a static web app hosted on Netlify with web push notifications, Resend for email delivery, Stripe for payments. Data comes from SEC EDGAR Form 4 and SEDI filings.
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