What is Polymarket? A concise trader guide
Polymarket is a decentralised prediction-market exchange where users buy and sell outcome shares that pay $1 if the outcome resolves YES and $0 if NO. It runs on Polygon, settles in pUSD (Polymarket's wrapped USDC), uses a Central Limit Order Book (CLOB) for matching, and relies on the UMA optimistic oracle for resolution. Traders use Polymarket to speculate, hedge, or capture intra-market arbitrage when outcome prices misprice relative to $1.
How Polymarket works
Markets on Polymarket are binary or multi-outcome; fair prices across outcomes sum to $1.00. Outcome shares are ERC-1155 tokens issued via the Gnosis Conditional Token Framework (CTF). Traders place limit or FAK market orders on the CLOB; maker fees are zero and taker fees vary by category.
Polymarket sponsors gas via a Relayer so end users trade gas-free; wallets are either a pre-deployed Gnosis Safe or a proxy wallet deployed on first use. Resolution is reported through UMA, and disputed resolutions can pause settlement until UMA resolves.
Why traders use Polymarket
Polymarket offers tight, fast markets on real-world events, useful for short-term speculation and hedging. Liquidity and order-book depth let active traders scalp spreads or execute multi-leg strategies where the math lines up.
Arbitrageurs historically captured meaningful returns on transient mispricings — roughly $40M was extracted across 2024–2025 — but you must account for slippage, partial fills, fees, and resolution risk before treating a trade as effectively locked.
Arbitrage opportunities on Polymarket
Intra-market arbitrage happens when the sum of best asks for complementary outcomes is below $1.00. Buying the complete set (split/mint via CTF) locks exposure to resolution and can yield an 'edge' equal to $1.00 minus the sum of asks. PolyArb focuses on these intra-market opportunities.
PolyArb is a paid arbitrage bot ($99/month) built for speed and reliability: 40ms latency vs ~800ms for free bots, Telegram and Discord alerts, non-custodial operation, and a $7.62 minimum guaranteed edge per trade. Note: spreads are mathematical but not free of risks like UMA disputes or settlement timing.
How this affects your trading
If you trade on Polymarket for information or speculative edge, understanding CLOB mechanics, tick sizes, and UMA resolution is essential. For systematic arb, execution speed, fee structure, and reliable monitoring matter more than raw signal generation.
PolyArb packages low-latency execution, alerts, and monitoring so you can capture short-lived intra-market edges more consistently, while remaining non-custodial and gasless on Polymarket's infrastructure.
Try PolyArb and capture Polymarket edges
Subscribe to PolyArb ($99/month) for 40ms execution, Telegram and Discord alerts, and a $7.62 minimum guaranteed edge on eligible trades. It's non-custodial and built specifically for Polymarket intra-market arbitrage.
FAQ
- Is Polymarket the same as PredictIt or Kalshi?
- No. Polymarket is a decentralised exchange on Polygon using pUSD, a CLOB, and UMA for resolution. PredictIt and Kalshi are regulated US platforms with different clearing, custody, and product models. Cross-platform comparisons are possible but out of scope for PolyArb.
- Do I need crypto to use Polymarket?
- You trade in pUSD (Polymarket's wrapped USDC) on Polygon. Polymarket sponsors gas via a Relayer, so you only need pUSD and a compatible wallet (MetaMask, Gnosis Safe, or other EIP-6963 connectors).
- Are arbitrage trades on Polymarket guaranteed profit?
- No guarantee. Intra-market spreads can be mathematical, but profits face slippage, partial fills, taker fees, UMA disputes, and settlement timing. PolyArb offers a $7.62 minimum guaranteed edge per trade, but operational and oracle risks remain.