Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 | 100% |
| O/U 1.5 | 100% |
| O/U 2.5 | 100% |
| O/U 3.5 | 100% |
| O/U 4.5 | 100% |
| Both Teams to Score | 100% |
| Both Teams to Score in First Half | 100% |
| 1st Half O/U 0.5 | 100% |
| 1st Half O/U 1.5 | 100% |
| 1st Half O/U 2.5 | 100% |
| Ulsan HD FC 1st Half O/U 0.5 | 100% |
| Gangwon FC 1st Half O/U 0.5 | 100% |
| Gangwon FC O/U 2.5 | 99% |
| Gangwon FC 1st Half O/U 1.5 | 99% |
| Both Teams to Score in Second Half | 99% |
| 2nd Half O/U 0.5 | 99% |
| 2nd Half O/U 1.5 | 99% |
| Ulsan HD FC 2nd Half O/U 0.5 | 99% |
| Gangwon FC 2nd Half O/U 0.5 | 99% |
| Ulsan HD FC O/U 1.5 | 75% |
| Gangwon FC O/U 0.5 | 75% |
| Gangwon FC O/U 1.5 | 75% |
| Ulsan HD FC O/U 0.5 | 65% |
| 2nd Half O/U 2.5 | 50% |
| Ulsan HD FC 2nd Half O/U 1.5 | 50% |
| Gangwon FC 2nd Half O/U 1.5 | 50% |
| Ulsan HD FC O/U 2.5 | 49% |
| Ulsan HD FC (-1.5) | 35% |
| O/U 5.5 | 17% |
| Gangwon FC (-1.5) | 14% |
| Gangwon FC (-2.5) | 14% |
| Ulsan HD FC (-2.5) | 6% |
| Ulsan HD FC 1st Half O/U 1.5 | 1% |
Market context
Ulsan HD and Gangwon FC meet in the K-League on 16 August at 6:30 AM ET. The market settles in USDC on btc-prediction.bet, with the current crowd-implied probability at 35% YES, suggesting traders favour outcomes other than the primary event. Settlement closes at 10:30 AM ET the same day, allowing roughly four hours post-kickoff for resolution confirmation via official K-League records.
Historically, Ulsan HD commands stronger home advantage metrics in K-League fixtures, with win rates approximately 8–12 percentage points higher at their ground than away. Gangwon's recent form has been inconsistent; their last five matches show two wins, two draws, and one loss. A 35% YES probability reflects either meaningful uncertainty around team selection, injury status, or a genuine statistical lean toward draw or Gangwon victory. Comparable mid-season K-League markets on this platform have typically settled within 40–50% ranges when crowd sentiment diverges this sharply from historical baseline performance.
Traders should monitor official K-League injury bulletins released 24–48 hours before fixture time, as squad depth directly influences Ulsan's tactical approach. Recent funding rate movements on major perpetual exchanges show modest BTC strength, which historically correlates with retail participation in lower-liquidity sports markets; spot USDC liquidity on Coinbase and Kraken remains stable. Any late-breaking team news—managerial changes, disciplinary suspensions, or weather alerts affecting pitch conditions—typically triggers repricing in the final 12 hours before Asian morning kickoffs.
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 does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- 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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