Extended vs Arcus
A side-by-side comparison of two perpetual DEXs using the same sources and capture time. Larger is not automatically better: check fees, markets, collateral and access rules for your own use.
- Extended holds 1.3× the open interest of Arcus ($96.78M vs $76.74M).
- Over the last 30 days traders paid $1.55M in fees on Extended and $1.08M on Arcus.
- Extended’s average open interest moved +5.7% over 30 days.
- Arcus’s average open interest moved +123.1% over 30 days.
 Extended |  Arcus | |
|---|---|---|
| Open interest | $96.78M | $76.74M |
| OI rank (of 50) | 9 | 13 |
| OI change · 30d | +5.7% | +123.1% |
| Volume · 24h | $533.93M | $603.20M |
| User fees · 30d | $1.55M | $1.08M |
| Fees change · 30d | -6.7% | +197.6% |
| Trend | Stable | Growing |
| Chains | Ethereum, Starknet | Robinhood Chain |
| Model | Order book | Not classified yet |
| RWA markets | Yes | Yes |
| Token | None verified | None verified |
| Base trading fees | Taker 0.025% · maker 0% ↗ | Taker 0.0225% · maker 0% ↗ |
| Max leverage | 100× ↗ | 50× ↗ |
| Collateral | USDC (settlement); also XVS vault shares, wBTC, ETH (90% contribution) and USDT (95%) ↗ | USDG (deposits converted to USDG) ↗ |
| KYC | Not required ↗ | Not verified |
| Referral program | Yes. Benefit for the referred trader: “Invited users receive a 10% discount on commissions for their first $50M in total trading volume.” ↗ | Yes; any discount for the referred trader is set by the referrer ↗ |
Open interest over time
- Extended $96.78M
- Arcus $74.87M
DefiLlama daily open interest. Missing days are left as gaps. The scale starts at zero.
Open interest and fees: DefiLlama, captured 08 Oct 2026 · 14:43 UTC. 24h volume: CoinGecko derivatives exchange data (rolling 24 hours, converted from BTC), captured 08 Oct 2026 · 14:43 UTC. Token prices and 30-day price change: CoinGecko, at the time shown on each venue page; a parent-project or chain token is labelled and is not evidence of a claim on exchange revenue. Changes compare the last 30 days with the previous 30 days (OI as a daily average, fees as a total) and need at least 95% daily coverage. A trend label needs the 30-day move to pass a threshold (OI ±25%, fees ±30%) on a minimum base (OI ≥ $5M, fees ≥ $100K per 30 days); with 90 days of history both horizons must agree. Venue-reported volume is not audited; ⚑ marks volume above 25× open interest. “—” means unavailable, never zero. Full method ↗