Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
75% | 25% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
75% | 25% | 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 Rounds | 75% |
| Juliana Miller vs. Ravena Oliveira | 74% |
| O/U 1.5 Rounds | 58% |
| Fight won by submission? | 46% |
| O/U 2.5 Rounds | 46% |
| Fight to Go the Distance? | 38% |
| Fight won by KO/TKO? | 23% |
| Oliveira to win by KO/TKO? | 9% |
| Miller to win by KO/TKO? | 6% |
Market context
Juliana Miller meets Ravena Oliveira in a women’s flyweight prelim at UFC Fight Night in Las Vegas, with the bout listed for three rounds and scheduled to start on the main card’s UFC APEX timetable. The market settles in USDC on-chain, so the key distinction is not who “looks better” on tape but whether the UFC posts an official winner before the settlement window closes; if the bout is pushed past 22 August or ruled a no contest, the contract resolves 50-50 instead of to either fighter. [2][11]
The current 74% crowd price is above most third-party pre-fight reads, which cluster much closer to a narrow Miller edge or even a near coin flip. One analytics model puts Miller at 58% with Oliveira at 42%, while another public odds page shows an even 50-50 split, so the market is already pricing a meaningful but not overwhelming preference for Miller rather than a dominant edge. [1][2] That shape fits a low-to-mid confidence favourite profile: enough support for Miller to lead, but still enough uncertainty around pace, durability and grappling exchanges to keep the underdog live. [1][6]
For traders, the main catalysts are the official bout result, any late scrape-through to the card, and any schedule slip tied to the UFC’s event timing. With the fight on a numbered UFC APEX prelim slate, the relevant dependency is simply whether the event runs as planned and the official card result lands before the market’s hard expiry; no secondary crypto macro factor is likely to matter unless broader risk sentiment sharpens enough to move USDC demand or exchange liquidity around settlement time. Recent preview coverage still treats the matchup as a live scheduled contest rather than a speculative placeholder, which supports using official UFC confirmation as the decisive trigger. [2][9]
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $57K.
Methodology
This page reads UFC Fight Night: Juliana Miller vs. Ravena Oliveira (Women's Flyweight, Prelims) on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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.
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- 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%.
Trade UFC Fight Night: Juliana Miller vs. Ravena Oliveira … on BTC Prediction
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