Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
82% | 18% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
82% | 18% | 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 |
|---|---|
| Match Winner | 82% |
| Game 1 Winner | 75% |
| Game 2 Winner | 75% |
| Both Teams Beat Roshan | 57% |
| Total Kills Over/Under 50.5 in Game 1? | 57% |
| First Blood in Game 2? | 56% |
| Game Handicap: Iron Wing (-1.5) vs GamerLegion (+1.5) | 54% |
| Any Player Ultra Kill | 53% |
| Total Kills Over/Under 50.5 in Game 2? | 53% |
| Ends in Daytime | 52% |
| Ends in Daytime | 52% |
| Any Player Rampage | 52% |
| Both Teams Destroy Barracks | 51% |
| First Blood in Game 1? | 51% |
| Ends in Daytime | 50% |
| Total Kills Over/Under 55.5 in Game 2? | 43% |
| Total Kills Over/Under 55.5 in Game 1? | 41% |
| O/U 2.5 Games | 39% |
| Both Teams Beat Roshan | 34% |
| Both Teams Beat Roshan | 34% |
| Any Player Ultra Kill | 31% |
| Any Player Ultra Kill | 28% |
| Both Teams Destroy Barracks | 27% |
| Both Teams Destroy Barracks | 27% |
| Any Player Rampage | 26% |
| Any Player Rampage | 26% |
Market context
Iron Wing face GamerLegion in a best-of-three elimination match at The International 2026, with the fixture originally scheduled for 16 August at 01:00 ET. The 75% crowd-implied probability favours Iron Wing, reflecting their recent form and perceived roster strength heading into the tournament's knockout phase. Settlement occurs at 11:00 UTC on 16 August, with a 14-day postponement window extending to 30 August should scheduling conflicts arise.
Historical precedent from prior International tournaments suggests elimination-round matches between established squads rarely favour the underdog by more than 30 percentage points unless there are documented roster changes or recent performance divergences. GamerLegion's qualification to this stage indicates competitive parity with Iron Wing; however, the 75% weighting suggests traders view Iron Wing's recent LAN placements or scrim results as materially stronger. Comparable fixtures from 2024–2025 Dota Pro League seasons show teams seeded similarly in elimination brackets typically settle within 60–70% ranges when one squad has demonstrated consistent map control and farming efficiency metrics.
Traders should monitor official tournament scheduling announcements from ESL or Valve, as fixture delays have historically shifted probabilities by 5–10 points depending on player availability and travel logistics. Any roster changes, stand-in deployments, or last-minute coaching adjustments announced within 48 hours of match time could trigger significant movement. Funding rates on perpetual Dota 2 esports derivatives remain subdued; watch for whale accumulation on either side if new information surfaces regarding player health or team preparation depth. The USDC settlement mechanism locks in at the scheduled time, so postponement beyond 30 August would trigger the 50-50 tie resolution clause.
Methodology
This page reads Dota 2: Iron Wing vs GamerLegion (BO3) - The International Elimination Round 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 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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