What Is Polymarket? A Complete Guide

Polymarket, in one paragraph

Polymarket is a decentralized prediction market where traders buy and sell YES/NO shares in the outcome of real-world events. Positions are collateralized in USDC — a dollar-pegged stablecoin — and trades settle on Polygon, an Ethereum sidechain.

You're not betting against a house. You're trading shares with other participants on an open order book, and the market price of each share is the crowd's estimate of probability.

How YES/NO shares and prices work

Every Polymarket market asks a binary question: "Will X happen by date Y?" If you buy YES and the event resolves your way, each share pays $1. If not, it pays $0. NO shares are the mirror image.

Because the payout is capped at $1, the share price lives between $0 and $1 — and that price is the market's implied probability. A YES share trading at $0.65 implies the market sees roughly a 65% chance the event happens.

A central limit order book (CLOB)

Polymarket matches trades on a CLOB — a central limit order book. Traders post resting bids and asks with sizes, and the book matches them at the best available price. This is the same structure used by modern crypto and equity exchanges.

The order book is why depth matters: the size resting at each price level tells you where support and resistance can form — the raw material of order book imbalance analysis.

How markets are resolved

When an event's outcome is determined, the market resolves on-chain through a DeFi-style oracle. YES holders receive $1 per share if the outcome matches; NO holders receive $1 if it doesn't.

Resolution is what makes prediction markets auditable: every outcome is a public record on the blockchain — the same record Vantex uses to verify its signal accuracy.

What you can trade

• Elections and politics — who wins, by how much, what they'll do next.
• Markets — BTC up or down, price ranges, and multi-timeframe crypto markets.
• Macro and Fed — rate decisions, inflation prints, and central bank moves.
• Sports — game outcomes, tournament winners, and player props.
• Other events — anything with a clear binary resolution.

How Vantex scans it

Polymarket is one of the two venues Vantex covers. Its real-time pipeline monitors 2,412 markets — reading the L2 order book for imbalances, matching equivalent events against Kalshi for divergence, and feeding the market graph to the Path Solver.

Vantex's signal accuracy is verified against on-chain outcomes — the same settlement record any Polymarket trader can check.