Evidence-backed insider transaction alerts for serious DIY investors

How it works

1. 1. Detect

   New SEC Form 4 insider filings are picked up continuously from public sources during the trading week.

2. 2. Rank

   Each filing is scored by insider role, transaction size, and pattern. Routine noise is filtered out.

3. 3. Deliver

   Concise, evidence-backed alerts land in Telegram, each linking back to the original filing.

How we rank filings

Hundreds of Form 4s are filed every market day. Most are routine. We look for the ones worth reviewing:

• Insider role. A purchase by a CEO, CFO, or director carries different weight than a 10% owner rebalancing.
• Transaction size. Dollar value — and, where visible, size relative to the insider's existing stake.
• Pattern. Cluster buying by several insiders in a short window is more notable than a single small buy — Pro has dedicated cluster alerts for exactly this.
• Noise filtering. Scheduled 10b5-1 sales, option exercises, and routine selling are down-weighted. Company purchase-plan batches — many insiders buying small lots at the identical price on the same day — are scored as routine and never trigger cluster alerts.

Every alert links back to the original SEC filing and includes relevant public context. Summaries avoid unsupported causality — we tell you what was filed, not what a stock will do.

What the scores mean

Signal score is a 0-1 score for how notable the filing looks from the filing itself. It weighs the trade type, dollar value, insider role, size relative to the insider's full position, and whether several insiders are moving around the same time. Very small trades cannot earn the position-size bonus, so a token purchase never outranks a multi-million-dollar one. For example, a director buying about $2M may score near 0.8, while a small routine sale may score near 0.2.

Context score is different. It measures how much useful public background we found for the alert. A high context score means the summary has stronger supporting material; a low score means the filing is clear, but the alert is mostly based on the SEC filing itself.

• Under 40% — the filing is clear, but little relevant public context surfaced.
• 40–70% — some supporting public context.
• 70% and up — strong corroborating context.

Cluster alerts carry their own cluster importance and cluster confidence: they start from the strongest member trade and rise with each additional insider, executive (CEO/CFO) involvement, and combined size.

None of these scores predict price movement. Use them to decide which filings deserve a closer look.

Cluster alerts: several insiders, one stock

One insider buying can be interesting. Several insiders independently buying the same stock within days is the pattern many investors watch most closely — and the hardest one to spot by hand, because the filings arrive separately, often days apart.

Pro detects it automatically:

• Rolling window. Open-market buys are grouped per stock across the last 3 trading days, so clusters that form across several days are caught — not just same-day ones.
• Cluster alert. When two or more distinct insiders have bought, one alert lists every member trade — role, size, price — with the combined value and a link to each SEC filing.
• Cluster updates. If another insider joins later, you get an update — "now 3 insiders" — not a duplicate.
• Evening coverage. Detection runs through the trading day, with a final sweep after the SEC's 10 PM ET filing cutoff, so evening filings are covered the same day.

Illustration of the alert format with placeholder values — not a real filing. Live cluster alerts appear in the Pro channel.

What a Pro alert looks like

Two recent alerts from the Pro channel — one buy, one sale — shown as examples of format and depth. Past filings, not live signals or recommendations.

Basic vs Pro