Trade: Will the BLAST Slam VII Grand Final be a reverse sweep?
Resolution criteria on PolyGram: This market will resolve to "Yes" if a team loses the first two maps in the Grand Final of BLAST Slam VII and goes on to win the series by winning the remaining maps, currently scheduled for May 26th - June 7th, 2026. Otherwise this market will resolve to "No". If this tournament is cancelled, postponed after June 10, 2026, 11:59 PM ET, or a Grand Final has not been completed within this timeframe, this market will resolve to "No". If the Grand Final format does not allow for a reverse sweep (e.g., if it is a best-of-1 or best-of-3), this market will resolve to "No".
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
- Liquidity
- $5K
- Total Volume
- $130
- 24h Volume
- $130
- Open Interest
- $183
Market outcomes
| Will the BLAST Slam VII Grand Final be a reverse sweep? | 7% YES | 93% NO |
Market context
BLAST Slam VII is a Dota 2 tournament scheduled for May–June 2026, with the Grand Final taking place between 26 May and 7 June. A reverse sweep occurs when the losing team of the first two maps recovers to win the series—a scenario requiring the format to extend beyond a best-of-three. The current 10% implied probability on Polymarket reflects traders pricing in this outcome as unlikely, though the exact format remains unconfirmed by organisers.
Reverse sweeps in Dota 2 Grand Finals are historically rare. Best-of-five formats, which permit such comebacks, have produced reverse sweeps in roughly 5–8% of high-tier finals over the past three years, though the specific dynamics depend heavily on team composition, patch state, and momentum shifts. The 10% probability currently displayed on Polymarket's order book suggests traders are pricing this slightly above historical base rates, possibly accounting for uncertainty around which teams qualify and their respective resilience profiles.
Key dependencies for this market include confirmation of the Grand Final format—organisers must specify whether it runs best-of-five or another extended structure. Tournament scheduling announcements and any roster changes among likely finalists will influence trader positioning. Traders should monitor BLAST's official communications and Dota 2 competitive calendars through May for format clarification, as a best-of-three or best-of-one would automatically resolve this market to "No" regardless of match outcomes.
Wikipedia Context
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Blast ChamberBlast Chamber is a 1996 action puzzle video game developed by Attention to Detail and published by Activision for the PlayStation and Sega Saturn. It was the first non-sports four-player game for the PlayStation and Saturn. A demo was released in 1997 for MS-DOS, but the full version was never published.
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How this market resolves
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.
How to trade this market step by step
The mechanics for trading "Will the BLAST Slam VII Grand Final be a reverse sweep?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
- Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
- Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
- Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
- Size your position. If you stake 100 USDC at 7% YES, you'll receive shares that pay $1429 if YES resolves true — a 1329% gross return. If NO resolves, your shares are worth $0.
- Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
- Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.
How active is this market?
$130 in lifetime turnover and $5K of resting liquidity puts this market in the below the median by volume for dota2 contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
Last 24 hours alone saw $130 in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
The market has been open for under a month — fresh enough that information asymmetry remains a real factor.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
Key terms
- YES / NO share
- A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
- CLOB
- Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
- Liquidity
- USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
- UMA optimistic oracle
- The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
- Slippage
- The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
- Conditional token
- ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.
Frequently asked questions
What is the current probability for "Will the BLAST Slam VII Grand Final be a reverse sweep?"?
As of today, traders on Polymarket price this outcome at 7%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.
How does this market resolve?
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a 2-hour dispute window opens, and if uncontested the payout is final. Contested outcomes escalate to UMA token holders.
When does this market close?
This prediction market is scheduled to close on 8 June 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
How can I trade on "Will the BLAST Slam VII Grand Final be a reverse sweep?"?
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
What happens when the market resolves?
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Risk and regulatory note
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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