Trade: Power Slap 20: Knockouts O/U 4.5
Resolution criteria on PolyGram: This market will resolve to “Over 4.5” if there are more than 4.5 total knockouts during the main card of Power Slap 20 scheduled for May 15, 2026, 9:00 PM ET. Otherwise, this market will resolve to “Under 4.5”. A knockout will be determined according to the official rules of Power Slap. Knockdowns or “flash knockdowns”, as defined by Power Slap, will not be counted toward the final knockout total. Matches involving a Redemption Round in which a draw is declared will not be counted toward the final knockout count. Only matches that result in a winner by knockout will be counted in the final count.
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
- $117
- Total Volume
- $1
- 24h Volume
- $1
- Open Interest
- $1
Market outcomes
| Power Slap 20: Knockouts O/U 4.5 | 72% YES | 28% NO |
Market context
Power Slap 20 takes place on 15 May 2026 at 9:00 PM ET, with the main card featuring multiple slapping matches that will conclude by the settlement window deadline. The market resolves to "Over 4.5" if more than four competitors are knocked out during the event, with knockouts defined strictly by Power Slap's official ruleset—knockdowns and flash knockdowns explicitly excluded. Currently trading at 72% implied probability for the Over, the order book on Polymarket reflects confidence that the event will produce at least five knockouts across its scheduled matchups.
Power Slap's knockout frequency has varied considerably across its event history. Earlier events in the promotion's run produced knockout rates ranging from two to six per main card, depending on fighter matchups and rule enforcement consistency. The 72% probability suggests the market is pricing in a moderately high knockout expectation relative to the median historical performance, indicating traders anticipate either particularly aggressive matchups or fighters with strong knockout records on the 15 May card.
Key variables affecting settlement include the official main card lineup announcement, which typically occurs weeks before the event, and any last-minute fighter substitutions that could alter knockout probability. Power Slap's judging and referee standards have evolved since the promotion's inception, potentially influencing knockout determination consistency. Traders should monitor official Power Slap announcements regarding the confirmed matchups and any rule clarifications issued closer to the event date, as these will directly inform whether the knockout threshold is likely to be exceeded.
Wikipedia Context
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Power SlapPower Slap is an American slap fighting promotion company owned by Dana White, the chief executive officer of the Ultimate Fighting Championship (UFC).
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Power supply unit (computer)A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a desktop computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the main voltage.
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Power stationA power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid.
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Power supplyA power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standa
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 "Power Slap 20: Knockouts O/U 4.5" are the same as any other PolyGram sporting 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 72% YES, you'll receive shares that pay $139 if YES resolves true — a 39% 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?
$1 in lifetime turnover and $117 of resting liquidity puts this market in the below the median by volume for sports 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 $1 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 "Power Slap 20: Knockouts O/U 4.5"?
As of today, traders on Polymarket price this outcome at 72%. 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 16 May 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 "Power Slap 20: Knockouts O/U 4.5"?
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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