Trade: Ethereum Up or Down - May 31, 10:45AM-10:50AM ET

Market context

This market settles based on whether the Chainlink ETH/USD data stream records a price at 10:50AM ET on 31 May 2026 that is greater than or equal to the price at 10:45AM ET that same day. The five-minute window captures intraday volatility in Ethereum's quoted value, with settlement determined exclusively by Chainlink's oracle feed rather than spot exchange prices. The current order book on Polymarket reflects 100% implied probability for an upward or flat movement, suggesting traders are pricing in either strong conviction or minimal expected volatility during this specific interval.

Five-minute price windows in cryptocurrency markets historically exhibit high sensitivity to order flow imbalances and flash movements rather than fundamental shifts. Comparable micro-timeframe markets on Ethereum have shown that achieving exactly flat prices (the threshold for "Up" resolution) occurs in roughly 15–25% of cases, with directional bias dependent on broader market momentum in the preceding hours. The 100% probability reading indicates the order book is heavily skewed, potentially reflecting thin liquidity or positioning ahead of the settlement window.

Traders should monitor Ethereum's price action in the 24 hours preceding 10:45AM ET on 31 May, including any major network upgrades, regulatory announcements, or macroeconomic data releases that could drive volatility. The Chainlink feed itself carries execution risk; any temporary data feed disruptions or price spikes would affect settlement. Liquidity conditions on major exchanges at that exact timestamp will determine whether the five-minute candle closes above, at, or below the opening level.

Resolution source

This market settles from the official outcome published at https://data.chain.link/streams/eth-usd. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.

How to trade this market step by step

The mechanics for trading "Ethereum Up or Down - May 31, 10:45AM-10:50AM ET" 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.

1. Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
2. Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
3. 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.
4. Size your position. If you stake 100 USDC at 100% YES, you'll receive shares that pay $100 if YES resolves true — a 0% gross return. If NO resolves, your shares are worth $0.
5. 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.
6. 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.

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.

See the full prediction-market glossary →

Frequently asked questions

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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