Predxy indexes the same question across every prediction market venue that carries it, collapses them into one number, and orders the questions by the money at risk. Nothing is placed by hand.
Every row on the index is a cluster: one question, with every venue carrying it already combined. "Four venues" means four venues carry that question and Predxy matched them. Matching is measured, reviewed by a person when uncertain, and never done by similarity alone.
The lead and the brief are ordered by weight, the sum of 24-hour volume across every venue carrying the question. Movers are the largest absolute change; closing soon is the soonest to settle. Each question appears once. There is no way to promote a question, and no person chooses the lead.
The lead and the brief are ordered by importance: money at risk over the last day, half again where two venues price the question, up to half again for a move of ten points, and a quarter again where it settles within a month; the top ten hold at most three of one category. Movers is the largest absolute change over the window, above a volume floor, one row per event; disagreeing is the widest spread between venues that price the question, five points or more, and is shown only when two or more qualify; closing is the soonest to settle; most read is what readers opened most over the last seven days, counted per question and never per person. Questions settling within 48 hours or priced beyond 99/1 are not listed. Each question appears once on the shelves below the brief, on the most significant shelf it reaches, and nothing below the brief is placed by hand.
A cluster asserts that its markets are comparable, not the same. Resolution rules differ between venues in settlement date, source of truth and edge cases, so every question page shows each venue's own rules beside its price.
Price recording began on 27 August 2026. A dash where a change should be means there is not yet enough history to say — not that nothing moved.
Venues are ranked on a weighted composite whose weights are fixed in code and whose per-metric breakdown is published with every score. A metric a venue does not report is excluded and reflected in coverage, never counted as zero, and a venue measured on too few metrics is flagged provisional.
A weighted composite over metrics grouped by provenance. Half the weight sits on figures venues report about themselves; the other half on what Predxy measures or derives by comparing venues, which a venue cannot influence.
Venue restrictions are two separate lists: countries a venue refuses to serve, and countries whose own regulator prohibits the venue and may penalise the individual. Both hide the trade button; the second comes with a warning. The decision is made in your browser from the country you set, so the same page can be shown to everyone.
A price is what traders were willing to pay, on that venue, at that moment. It is evidence about the world, not a verdict on it, and Predxy never says a story caused a move — only that it moved alongside one.
Your country decides which venues may offer you a trade. Your language and theme are remembered on this device.
Every number on this site comes from the Predxy API, which is available to developers on request. The reference lives on the documentation host.
The API →