Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
59% | 41% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
59% | 41% | 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 |
|---|---|
| Both Teams Slay a Dragon | 59% |
| Both Teams Slay a Dragon | 57% |
| Total Kills Over/Under 27.5 in Game 2? | 57% |
| Total Kills Over/Under 39.5 in Game 1? | 55% |
| Total Kills Over/Under 27.5 in Game 1? | 55% |
| Total Kills Over/Under 42.5 in Game 1? | 53% |
| Any Player Penta Kill | 52% |
| Both Teams Slay Baron Nashor | 51% |
| Both Teams Destroy Inhibitors | 51% |
| Total Kills Over/Under 42.5 in Game 2? | 51% |
| Any Player Quadra Kill | 50% |
| Odd/Even Total Kills | 50% |
| Any Player Quadra Kill | 50% |
| Odd/Even Total Kills | 50% |
| Both Teams Slay a Dragon | 50% |
| Any Player Quadra Kill | 50% |
| Odd/Even Total Kills | 50% |
| First Blood in Game 1? | 50% |
| Total Kills Over/Under 39.5 in Game 2? | 50% |
| Game 1 Winner | 49% |
| O/U 2.5 Games | 49% |
| Game 2 Winner | 47% |
| Match Winner | 47% |
| First Blood in Game 2? | 44% |
| Total Kills Over/Under 30.5 in Game 2? | 42% |
| Total Kills Over/Under 30.5 in Game 1? | 41% |
| Both Teams Slay Baron Nashor | 37% |
| Game Handicap: NIP (-1.5) vs Weibo Gaming (+1.5) | 30% |
| Any Player Penta Kill | 26% |
| Any Player Penta Kill | 26% |
| Both Teams Slay Baron Nashor | 25% |
| Both Teams Destroy Inhibitors | 24% |
| Both Teams Destroy Inhibitors | 24% |
| Game Handicap: WB (-1.5) vs Ninjas in Pyjamas (+1.5) | 23% |
Market context
The LoL: Weibo Gaming vs Ninjas in Pyjamas (BO3) - LPL Group Nirvana prediction market currently prices this outcome at 59% YES. This market refers to the LoL match between Weibo Gaming and Ninjas in Pyjamas in the LPL Group Nirvana, initially scheduled for August 13 at 3:00AM ET. This market will resolve to "Weibo Gaming" if …
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.
- 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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