ARB, UNI and STRK Surge as Altcoin Rally Accelerates
Arbitrum (ARB)
Editor:
Eugene Serbin
jrkripto.com reported that the cryptocurrency market extended its gains on Friday, September 18, with Arbitrum, Uniswap and Starknet outperforming Bitcoin. Arbitrum’s ARB token recorded a 24-hour gain of 30.9%, trading at approximately $0.2133 with a market capitalization of roughly $1.45 billion. Uniswap’s UNI token climbed 24.8% to approximately $8.62, while Starknet’s STRK advanced 20.4% to trade at approximately $0.03374.
Bitcoin rose approximately 2% to $78,065, but the three altcoins delivered higher returns over the same period. ARB’s 24-hour trading volume reached $749.3 million, while UNI’s volume hit $2.23 billion. STRK’s trading volume was $75.8 million, and its market capitalization stood at $247.7 million.
All three tokens traded below their respective 24-hour highs at the time of the check, though ARB gained 51.4% over the past seven days. CoinDesk’s September 18 assessment noted that 98 of the 100 assets in the CoinDesk 100 index were trading higher. The recovery was accompanied by the US 10-year Treasury yield falling below 5% and Brent crude retreating below $103.
How the market reacted
Whalio's own Binance spot order flow for ARB, measured when this story was written up on 18 September 2026. Not the outlet's figures.
Whalio’s Binance spot data for ARB shows a price of $0.1773, with a 1-hour buy ratio of 58.2% and a 4-hour buy ratio of 52.4%. These short-term ratios exceed the 24-hour buy ratio of 49.6%, indicating that buying pressure is currently building relative to the daily average. The 1-hour volume delta is positive at +$507,417, while the 4-hour delta is +$655,314, contrasting with a negative 24-hour delta of -$312,358. A positive volume delta means that buy volume exceeded sell volume during that period, while a negative delta indicates the opposite. The 24-hour cumulative volume delta closed at +$1,472,179, with net buying occurring in 13 of the last 24 hours.
The latest daily buy ratio of 46.4% sits at the 8th percentile of the last 324 days, against a median of 49.6% - among the weakest buying days it has had.
Was that an ordinary day?
The same Binance spot measurements for ARB, averaged over the days leading up to the story.
Over the preceding week, ARB’s average buy ratio was 49.7%, and the latest day’s reading was -0.1 points lower than that average. Spot volume over the period was 1.48x the average, while net buying occurred on only 3 of the 7 days. The price changed by +26.8% over 8 days, with a total volume delta of +$574,492. This represents an unusual day for volume activity compared to the weekly norm, as trading volume was significantly higher than average. However, the buy ratio remained essentially flat compared to the weekly baseline, suggesting that while more volume flowed through the market, the balance between buyers and sellers did not shift dramatically from the weekly trend.