How Does Astronomer Work?

Astronomer is an educational platform that surfaces real-time options activity. Our algorithms detect statistically significant changes in options volume and flow, with an AI layer that summarizes and contextualizes each detection. Signals are observations of market activity, not recommendations to buy or sell.

Sign up for a free 7-day trial and you'll start receiving signals in the Astronomer app and by email.

Each signal comes with detailed analytics and context — the strike, timing, and the underlying's price action — so you can interpret what our algorithm detected and decide for yourself. What you do with that information is entirely your call; nothing we provide is a recommendation to buy or sell.

We analyze various types of ticker symbols, currently the best signals are generated from high-volume symbols: NVDA, SPY, AMZN, AAPL, but any ticker symbol with significant volume may generate signals.

We offer several pricing tiers to fit different needs, from individual researchers to professional market participants. Visit our pricing page for detailed information, or start with our free trial to explore all features.

Yes, you can cancel your subscription at any time with no penalties or cancellation fees. If you cancel, you'll continue to have access until the end of your current billing period.

No. The core signal is a quantitative model that detects statistically significant changes in options volume and flow in real time — deterministic, measurable, and logged to a public history you can audit. AI sits on top to summarize and contextualize each detection; it isn't the thing generating the signal. If you've been burned by "ask-the-chatbot" market-analysis tools, that's precisely what this isn't.

Signal Stream is active during the live signal window from 9:30 AM to 3:00 PM Eastern Time, Monday through Friday. Outside that window, Signal Stream clients should reconnect when the next signal window opens.

Astronomer records detections and subsequent market observations for educational research. It does not provide entry or exit recommendations.