Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
88% | 12% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
88% | 12% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 88% |
| O/U 1.5 | 63% |
| 1st Half O/U 0.5 | 56% |
| Both Teams to Score in First Half | 50% |
| AGS Astéras Trípolis O/U 0.5 | 50% |
| AGS Astéras Trípolis O/U 1.5 | 50% |
| AGS Astéras Trípolis O/U 2.5 | 50% |
| AS Áris Thessaloníkis O/U 0.5 | 50% |
| AS Áris Thessaloníkis O/U 1.5 | 50% |
| AS Áris Thessaloníkis O/U 2.5 | 50% |
| AGS Astéras Trípolis 1st Half O/U 0.5 | 50% |
| AGS Astéras Trípolis 1st Half O/U 1.5 | 50% |
| AS Áris Thessaloníkis 1st Half O/U 0.5 | 50% |
| AS Áris Thessaloníkis 1st Half O/U 1.5 | 50% |
| Both Teams to Score in Second Half | 50% |
| 2nd Half O/U 0.5 | 50% |
| 2nd Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| AGS Astéras Trípolis 2nd Half O/U 0.5 | 50% |
| AGS Astéras Trípolis 2nd Half O/U 1.5 | 50% |
| AS Áris Thessaloníkis 2nd Half O/U 0.5 | 50% |
| AS Áris Thessaloníkis 2nd Half O/U 1.5 | 50% |
| 1st Half O/U 2.5 | 49% |
| Both Teams to Score | 45% |
| O/U 2.5 | 35% |
| 1st Half O/U 1.5 | 17% |
| O/U 3.5 | 16% |
| AS Áris Thessaloníkis (-1.5) | 14% |
| AGS Astéras Trípolis (-1.5) | 12% |
| O/U 4.5 | 6% |
| AS Áris Thessaloníkis (-2.5) | 4% |
| AGS Astéras Trípolis (-2.5) | 3% |
| O/U 5.5 | 1% |
Market context
Market consensus: 88% chance of ags astéras trípolis vs. as áris thessaloníkis - more markets. Prediction markets aggregate real capital to produce this probability signal. More markets for the Greek Cup game, scheduled for September 9 at 10:45 AM ET.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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