"Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" is a 5-minute prediction market on Polymarket where traders buy and sell shares on whether Ethereum's price will finish higher ("Up") or lower ("Down") than its opening price over the 5-minute window specified in the title. The current market probability is 51% for "下落." A price of 51% means the market collectively assigns a 51% chance to that outcome. Prices update in real-time as traders react to live Ethereum price movements. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" is an active short-term market on Polymarket. Trading volume can accumulate quickly as the 5-minute window progresses — jump in early to help set the odds before this window closes.

To trade on "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET," decide whether you believe Ethereum's price will finish above or below the opening "Price to Beat" by 2:45AM ET. Buy "Up" if you think the price will rise, or "Down" if you think it will fall. Enter your amount and click "Trade." If your chosen outcome is correct at resolution, each share pays out $1.00. If incorrect, shares are worth $0. Because this market resolves in 5 minutes, the window to exit your position before resolution is short — trade with that in mind.

The current probability for "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" is 51% for "下落," meaning the Polymarket crowd currently assigns a 51% chance that Ethereum's price will finish 下落 over this 5-minute window. These odds update in real-time as traders react to live Ethereum price data. Because this window resolves in 5 minutes, odds can shift sharply in the final seconds. Check back frequently or trade now before the window closes.

The "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" market resolves based on whether Ethereum's price at the end of the 5-minute window is greater than or equal to its price at the start of that window — if so, the outcome is "Up"; otherwise it is "Down." The resolution source is the Chainlink ETH/USD data stream. You can review the complete resolution criteria and data source in the "Rules" section on this page. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and data sources that govern how this market is settled.

Yes. You don't need to trade to stay informed. Each "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" page shows the live "Price to Beat" (Ethereum's opening reference price for this window), the current live Ethereum price, and real-time Up/Down probabilities. Because each market window lasts 5 minutes, individual pages resolve quickly — use the time-range navigation features at the top of the page to jump between windows and track how odds evolved across multiple intervals. You can also view the Order Book and Activity tab for a real-time feed of trade flow.

Polymarket odds are set by real traders putting real money behind their beliefs. “Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET” is still building its trading base for this window, so the current Up/Down probabilities may reflect only a small number of trades. As more participants enter before the window closes, the odds will become increasingly robust. For the latest stats on Polymarket's overall prediction accuracy, visit the accuracy page on Polymarket.

To place your first trade on "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET," sign up for a free Polymarket account and fund it using crypto, a credit or debit card, or a bank transfer. Once your account is funded, return to this page — or navigate to the current active 5-minute window using the navigation bar at the top of the page — select "Buy Up" or "Buy Down," enter your amount, and click "Trade." If the window shown in the title has already closed, use the navigation bar to find the current live window. If you're new to prediction markets, click the "How it works" link at the top of any Polymarket page for a quick step-by-step walkthrough.

On Polymarket, the price of each outcome represents the market's implied probability. A price of 51¢ for "下落" in the "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" market means traders collectively believe there is roughly a 51% chance that Ethereum's price will finish 下落 over this 5-minute window. If you buy "下落" shares at 51¢ and Ethereum finishes in that direction, you receive $1.00 per share — a profit of 49¢ per share. If Ethereum moves the other way, those shares are worth $0. Because this market resolves in 5 minutes, prices can shift dramatically in a very short time.

The "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" market is live and resolves at 2:45AM ET — approximately about 3 hours from now. Trading is open. The Up/Down odds will continue shifting in real time as Ethereum's price moves and traders react. Once the window closes, the market resolves based on whether the final Chainlink ETH/USD price is above or below the opening Price to Beat.

The "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET" market has 53 comments where traders share their analysis and react to live Ethereum price movements. Scroll down to the comments section to read what other participants think. You can also check the "Activity" tab for a real-time feed of trades on this window.

Polymarket is the world's largest prediction market, where you can stay informed and profit from your knowledge of real-world events. Traders buy and sell shares on outcomes for topics ranging from politics and elections to crypto, finance, sports, tech, and culture — including 5-minute Ethereum direction markets like "Ethereum Up or Down - 2月21日2:40 AM -2:45 AM ET." Prices reflect real-time, crowd-sourced probabilities backed by financial conviction, often providing faster and more accurate signals than polls, pundits, or traditional surveys.