pricing
Free teaches the concept.
Pro is the workflow.
The free tier must be good enough to teach the category, or nothing upstream of it works. So Observer isn't a demo — it's the whole concept, uncrippled.
for learning the category
students, educators, the curious
- Two baskets
- The full decomposition — group + solo on every member, every session
- The complete chart family: comparisons, ghost priors, σ-units
- Delayed market data
- The methodology, all of it — nothing is paywalled about how the numbers are made
for the daily practice
active pairs & basket traders
- Everything in Observer
- Unlimited baskets and pairs
- Live market data
- The divergence feed — your watched relationships, sorted by stretch
- Tradability panels: reversion tendency, half-life, sample honesty
- Assumption-watch notices when β breaks or cohesion decays
- The out-of-sample ledger — your record, kept honestly
ships when Pro earns it
for people who run it like a job
- Everything in Practitioner
- The book view — Neff across everything you watch
- Discovery scans with the false-discovery math on the label
- API access and export
Priced against data subscriptions, not against apps: Practitioner costs less than most standalone live-data feeds, and the analytics come with it. Desk ships only after Practitioner retention proves the core — we'd rather earn the tier than announce it.
· honest answers
Things you'd ask us anyway.
why is the free tier so complete?
Because the category is new. Nobody wakes up wanting "leave-one-out decomposition" — they discover it by watching their own basket split a move into group and solo. Observer exists to make that discovery free.
will mpriors tell me what to trade?
No — and that's structural, not a missing feature. Mpriors describes: how stretched a divergence is, how similar stretches historically behaved, when a relationship's assumptions changed. What to do about it stays yours. See the method →
what happens when a relationship breaks?
You get an assumption-watch notice naming what moved — β break, cohesion decay, a record stretch — the moment the measurement stops meaning what it meant. Mean reversion's failures are rare and violent; watching the assumptions is the honest defense.
can I check the math?
Please do. Every number reconciles to change = group + solo exactly, every statistic names its test and window, and the methodology is published in full — including the estimator's known biases. Our best users are the ones who check.
Start with two baskets, free.
No card, no trial clock. Build a basket of five names and watch the decomposition unlock.