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Polymarket wiki: quick guide for traders

Polymarket wiki: this page is a concise reference for traders who need the essentials fast. Polymarket is a decentralized prediction-market exchange on Polygon where binary and multi-outcome markets trade via a CLOB and settle in pUSD. If you’re evaluating arbitrage, this guide explains how intra-market spreads arise and how a product like PolyArb automates capture with a $7.62 minimum guaranteed edge per trade.

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What Polymarket is

Polymarket is a decentralized prediction-market exchange running on Polygon with pUSD as the settlement asset. Markets are implemented with the Gnosis Conditional Token Framework; outcomes are ERC-1155 tokens and resolution uses the UMA optimistic oracle. Trading executes on a Central Limit Order Book (CLOB) with limit and FAK market orders and gas sponsored by Polymarket’s Relayer.

How intra-market arbitrage works

Intra-market binary arbitrage happens when bestAsk(YES) + bestAsk(NO) < $1.00. For multi-outcome markets you compare the sum of best asks across all outcomes against $1.00. Buying the complete set and splitting/merging via CTF locks the mathematical spread as edge, subject to execution, fees, and settlement risks. Remember: spreads can vanish in seconds on liquid markets and are not free of risk — resolution disputes, slippage, fees, and smart-contract risks remain.

APIs and data you need

Polymarket provides Gamma, Data, and CLOB REST APIs plus a market WebSocket for real-time books. Gamma’s /markets endpoint, Data’s positions and trades feeds, and the CLOB orderbook and midpoint endpoints are the primitives arbitrage bots use. Rate limits and cursor-based pagination on Gamma influence how you poll listings; the market WebSocket pushes fast book updates and tick_size_change events.

Where PolyArb fits

PolyArb is a non-custodial arb bot service designed for traders who want low-latency execution and alerts. For $99/month you get ~40ms latency vs ~800ms for many free bots, Telegram and Discord alerts, and a $7.62 minimum guaranteed edge per trade. PolyArb automates order placement, monitors spreads, and integrates CTF ops while leaving funds in your wallet. It does not remove settlement or oracle risks — those are inherent to Polymarket.

Start capturing Polymarket spreads with PolyArb

Try PolyArb for $99/month to get 40ms execution, Telegram + Discord alerts, and the $7.62 minimum guaranteed edge on eligible trades. Non-custodial and live today.

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FAQ

Is Polymarket legal where I live?
Polymarket applies geographic restrictions and blocks new orders in certain countries and regions. Some jurisdictions are close-only. Do not attempt VPN workarounds; check Polymarket’s official restrictions before trading.
Can PolyArb guarantee profits?
PolyArb guarantees a minimum edge per qualifying trade but does not eliminate risks such as resolution disputes, partial fills, slippage, or smart-contract risk. Guaranteed edge refers to execution logic, not legal or settlement certainty.
What APIs should I use for market data?
Use Gamma for markets metadata, Data for positions and trades, and the CLOB API plus the market WebSocket for live orderbook and price updates. Those are the official endpoints for programmatic access.

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