Arbitrum co-founder addresses decentralization concerns over Robinhood Chain
Arbitrum (ARB)
Editor:
Eugene Serbin
Cryptobriefing.com reports that Arbitrum co-founder Steven Goldfeder has weighed in on the centralization of Robinhood Chain, which launched its mainnet on July 1, 2026. The chain, built on Arbitrum’s Orbit technology with chain ID 4663, settles to Ethereum but features a sequencer controlled entirely by Robinhood. Goldfeder argues that decentralizing the sequencer would improve censorship resistance without altering the existing fraud-proof system.
Robinhood currently holds sole control over transaction ordering, supported by only two whitelisted fraud-proof challengers. Upgrades to the network require a 7-of-8 multisig agreement, highlighting the concentrated power structure. Despite these centralization risks, the chain processed over 200 million transactions during its testnet phase with 100-millisecond block times.
In July 2026, Robinhood Chain contributed roughly $360K to the Arbitrum DAO, representing about 35% of the DAO’s monthly income. By September 1, 2026, the chain recorded a single-day fee total of $3.75 million, driven by high DEX volumes from memecoin trading. A brief outage on September 4, 2026, disrupted block production for at least 14 minutes, demonstrating the single point of failure inherent in the current architecture. Goldfeder emphasizes that distributing transaction ordering across multiple independent operators can solve these issues while maintaining Ethereum’s security guarantees.
How the market reacted
Whalio's own Binance spot order flow for ARB, measured when this story was written up on 12 September 2026. Not the outlet's figures.
ARB is trading at $0.1395 with a 1-hour buy ratio of 71.6%, indicating strong short-term buying pressure. This contrasts sharply with the 4-hour buy ratio of 51.2% and the 24-hour buy ratio of 46.4%, suggesting that recent buying activity is accelerating after a period of relative balance. The 1-hour volume delta is positive at +$260,926, while the 24-hour volume delta is negative at -$1,681,495. This divergence shows that net buying has increased significantly in the last hour compared to the broader daily trend. CVD for the 24-hour period closed at -$1,070,907, confirming that sellers dominated the flow over the full day before the recent shift. Spot volume for the 24-hour period stands at $24,204,574 across 226,046 trades.
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, the 7-day average buy ratio was 49.8%, making the current 24-hour ratio of 46.4% slightly below the weekly norm by 3.3 points. The 24-hour volume of $24,204,574 is 0.47 times the weekly average, indicating a quieter trading day compared to the previous week's activity. Volume delta for the 8-day period totaled +$1,057,706, contrasting with the negative 24-hour delta of -$1,681,495. This suggests that while the immediate past day saw net selling, the broader weekly trend has been one of net accumulation. The price increased by 5.8% over the 8-day period, with net buying occurring on 4 of the 7 days. This context frames the current day as an unusual dip in volume and buying ratio relative to the steady weekly accumulation.