Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 100% |
| 1st Half O/U 0.5 | 100% |
| Wrexham AFC O/U 0.5 | 100% |
| Wrexham AFC 1st Half O/U 0.5 | 100% |
| 2nd Half O/U 0.5 | 72% |
| Both Teams to Score in Second Half | 54% |
| O/U 1.5 | 53% |
| 2nd Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| Cardiff City FC 2nd Half O/U 0.5 | 50% |
| Cardiff City FC 2nd Half O/U 1.5 | 50% |
| Wrexham AFC 2nd Half O/U 0.5 | 50% |
| Wrexham AFC 2nd Half O/U 1.5 | 50% |
| Both Teams to Score | 33% |
| Cardiff City FC O/U 0.5 | 32% |
| Wrexham AFC O/U 1.5 | 28% |
| Wrexham AFC (-1.5) | 20% |
| O/U 2.5 | 16% |
| Cardiff City FC O/U 1.5 | 7% |
| Wrexham AFC O/U 2.5 | 5% |
| O/U 3.5 | 3% |
| Cardiff City FC (-1.5) | 2% |
| Wrexham AFC (-2.5) | 2% |
| Cardiff City FC (-2.5) | 1% |
| O/U 4.5 | 1% |
| Cardiff City FC O/U 2.5 | 1% |
| O/U 5.5 | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
| Cardiff City FC 1st Half O/U 0.5 | 0% |
| Cardiff City FC 1st Half O/U 1.5 | 0% |
| Wrexham AFC 1st Half O/U 1.5 | 0% |
Market context
Cardiff City and Wrexham AFC meet in the EFL Championship on 17 August at 3:00 PM ET, with settlement tied to additional markets beyond standard match outcomes. The 2% implied probability reflects extremely low conviction that whatever specific condition this market tracks will occur—suggesting either a narrow technical outcome or an event with genuine scarcity in historical precedent.
Championship fixtures between established Welsh clubs carry particular weight given fixture congestion and squad rotation patterns in late August. Wrexham's return to the EFL after a 15-year absence has drawn sustained media attention, though their competitive standing remains uncertain following promotion through the National League. Cardiff, by contrast, operates with established Championship infrastructure and recent playoff experience. Historical data on similar pairings—particularly lower-probability secondary markets in opening-weekend fixtures—shows settlement often hinges on specific performance thresholds or rare occurrences rather than match result alone.
Traders should monitor team news releases through 16 August, particularly injury confirmations or late squad adjustments that might affect playing patterns. Weather conditions at Cardiff City Stadium could influence match flow if precipitation is forecast. Wrexham's fixture preparation and any statements from management regarding tactical approach warrant attention, as these sometimes signal whether the club prioritises possession-based play or direct methods—factors that shape secondary market outcomes. Settlement window closure at 19:00 GMT on match day leaves minimal buffer for clarification once play concludes.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- 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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