"Ethereum Up or Down on September 18?" is a daily 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 daily window specified in the title. The current market probability is 72% for "Up." A price of 72% means the market collectively assigns a 72% 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 on September 18?" is an active short-term market on Polymarket. Trading volume can accumulate quickly as the daily window progresses — jump in early to help set the odds before this window closes.

To trade on "Ethereum Up or Down on September 18?," decide whether you believe Ethereum's price at noon ET on September 18 will be higher ("Up") or lower ("Down") than Ethereum's price at noon ET on September 17. Buy "Up" if you think the price will rise day-over-day, 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.

The current probability for "Ethereum Up or Down on September 18?" is 72% for "Up," meaning the Polymarket crowd currently assigns a 72% chance that Ethereum's price will finish up over this daily window. These odds update in real-time as traders react to live Ethereum price data. Over a full day, odds reflect evolving sentiment as the day's price action unfolds. Check back frequently or trade now before the window closes.

The "Ethereum Up or Down on September 18?" market resolves based on a comparison of Ethereum's price at noon ET on September 18 versus noon ET on September 17, using Binance ETH/USDT 1-minute candle close prices. If the September 18 noon price is higher, the outcome is "Up"; if lower, "Down"; if equal, the market resolves 50-50. You can review the complete resolution criteria and data source in the "Rules" section on this page.

Yes. You don't need to trade to stay informed. Each "Ethereum Up or Down on September 18?" page shows real-time Up/Down probabilities reflecting trader sentiment on whether Ethereum will be higher or lower at noon ET tomorrow versus today. Use the date navigation features at the top of the page to browse past and upcoming daily windows. 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 on September 18?” 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 on September 18?," 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 daily 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 72¢ for "Up" in the "Ethereum Up or Down on September 18?" market means traders collectively believe there is roughly a 72% chance that Ethereum's price will finish up over this daily window. If you buy "Up" shares at 72¢ and Ethereum finishes in that direction, you receive $1.00 per share — a profit of 28¢ per share. If Ethereum moves the other way, those shares are worth $0. Prices can shift throughout the day as Ethereum's price action unfolds toward the noon ET close.

The "Ethereum Up or Down on September 18?" market is live and resolves at Noon ET September 18 — approximately about 1 day 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 Ethereum's Binance price at noon ET on September 18 is higher or lower than at noon ET on September 17.

The "Ethereum Up or Down on September 18?" market has 1,081 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 daily Ethereum direction markets like "Ethereum Up or Down on September 18?." Prices reflect real-time, crowd-sourced probabilities backed by financial conviction, often providing faster and more accurate signals than polls, pundits, or traditional surveys.