# Ostium Alternatives for Commodity and FX Perpetuals Cross-Asset Desk Research. Edition of 24 September 2026; terms read 18 September 2026. Weights: What one account reaches 32 · Cost of getting in and out 28 · Custody of the margin 18 · How the venue has held up 12 · The book behind the quote 10, on a scale of 100. Version 1.1, fixed 23 September 2026. Method: https://gerhardandlinger.net/method ## In brief Traders look for Ostium alternatives when they want a resting order book instead of an oracle and a pool, or markets that do not close with the underlying session. Six order-book venues qualify; Lighter leads at 90 of 100. Every one of the six quotes from a book a reader can poll. ## Order-book alternatives to an oracle-priced venue Ordered by the overall score. Every venue here runs a resting order book rather than an oracle and a pool, which is the structural difference a trader is usually looking for when they start comparing. A second condition decides the rows: a venue is scored only when its own documentation lists four or more asset classes outside crypto. That is what a trader leaving an oracle venue is shopping for, and it is why edgeX, ApeX Omni and Paradex — three classes apiece — no longer appear in the table. | # | Venue | When the non-crypto markets are open | Score of 100 | Perp markets | Maker / taker | Venue type | |---|---|---|---|---|---|---| | 1 | Lighter | Real-world assets stated as 24/7; no venue-wide hours page | 90 | 214 | 0% / 0% | Hybrid, ZK-proven | | 2 | Extended | Order-book real-world assets 24/7; Prime markets 24/5 or session-bound | 85 | 325 | 0% / 0.025% | Hybrid | | 3 | Aster | not stated in the documentation we read | 82 | 578 | 0% / 0.040% | Own layer 1, operator-run | | 4 | Hyperliquid | not stated in the documentation we read | 76 | 324 | 0.015% / 0.045% | On-chain order book | | 5 | EVEDEX | All markets 24/7, shares and commodities included | 67 | 52 | 0.015% / 0.045% | Hybrid | | 6 | Aevo | not stated in the documentation we read | 58 | 102 | 0.050% / 0.080% | Hybrid | Figures read on 18 September 2026; fees are the entry tier on the BTC perpetual. Access differs by country. ## What the ranking turns on 1. Structural difference: a resting book you can measure, against a pool quoting an oracle price. 2. Hours: Ostium follows the cash session; EVEDEX documents 24/7 across every market it lists. 3. Depth you can check: the six books here ran from $3.8 million to $19.1 million of BTC within 10 bps. 4. Breadth of a different shape: 74 of Ostium's 83 markets sit outside crypto, where an order-book venue's list is mostly crypto. ## The order-book readings BTC order books read on a timer, ten minutes apart, closing 17:58 UTC on 20 September 2026; medians of the snapshots behind each row. | Venue | Median spread | Median depth within 10 bps | Median impact, $100,000 order | $10,000 round trip, taker fees | Snapshots | |---|---|---|---|---|---| | Lighter | 0.27 bps | $16.5 million | 0.45 bps | $0.00 | 17 | | Extended | 0.12 bps | $7.4 million | 0.06 bps | $5.00 | 17 | | Aster | 0.01 bps | $13.8 million | 0.39 bps | $8.00 | 27 | | Hyperliquid | 0.12 bps | $10.1 million | 0.06 bps | $9.00 | 28 | | EVEDEX | 4.12 bps | $19.1 million | 2.06 bps | $9.00 | 28 | | Aevo | 1.61 bps | $3.8 million | 2.87 bps | $16.00 | 28 | ## 1. [Lighter](https://docs.lighter.xyz) — for the cheapest order book with commodity exposure Score 90 of 100. Lighter matches orders off-chain and proves batches on Ethereum, with critical exits submittable on-chain ([Lighter docs](https://docs.lighter.xyz/about-lighter/technical-architecture-lighter-core.md), checked 18 September 2026). It lists 214 markets across six asset classes and trades at 0% maker / 0% taker on the default account. - In favour: 0% maker and taker on the default account; On-chain exit documented. - Against it: Hours stated for its real-world-asset markets but not venue-wide; 300 ms taker delay on the free tier. - Wrong fit for: traders who need dozens of equity listings. ## 2. [Extended](https://docs.extended.exchange/) — for the closest match on breadth Score 85 of 100. Extended lists 325 markets across five asset classes including pre-IPO contracts ([Extended docs](https://docs.extended.exchange/extended-resources/trading/rwa-markets), checked 18 September 2026), the widest non-crypto coverage among order-book venues here, at 0% maker / 0.025% taker for every account. - In favour: 325 markets across five classes; Public bug bounty of up to $500,000. - Against it: No documented forced withdrawal; Prime real-world-asset markets halt outside their sessions. - Wrong fit for: traders who want an operator-independent exit. ## 3. [Aster](https://docs.asterdex.com) — for the longest listing of any venue here Score 82 of 100. 578 perpetual markets spread over six asset classes ([Aster docs](https://docs.asterdex.com/overview/what-is-aster.md), checked 18 September 2026), priced at 0% maker / 0.040% taker. Aster Chain does the matching; its core contracts have not been published for reading, and the validator set stays closed through phase one. - In favour: 578 perpetual markets; 0% maker fee. - Against it: Chain contracts are not open-sourced; No external validators in phase one. - Wrong fit for: a desk that needs the chain under its positions publicly validated. ## 4. [Hyperliquid](https://hyperliquid.gitbook.io/hyperliquid-docs) — for the largest venue by open interest Score 76 of 100. The entire book lives inside a layer 1 Hyperliquid built for it, which makes every order and every fill a transaction on that chain ([Hyperliquid docs](https://hyperliquid.gitbook.io/hyperliquid-docs/about-hyperliquid.md), checked 18 September 2026). Open interest read $8.7 billion in CoinMarketCap's 22 September 2026 table. At the entry tier the rate is 0.015% maker / 0.045% taker. - In favour: Open interest of $8.7 billion on CoinMarketCap; Median BTC depth of $10.1 million. - Against it: Builder-deployed markets are not reviewed by the interface operator; No documented forced withdrawal. - Wrong fit for: traders who want every listing vetted by one operator. ## 5. EVEDEX — for the alternative that answers the weekend complaint Score 67 of 100. Orders meet off the chain and Arbitrum settles them. The list runs to 52 markets — crypto, gold through XAUT, silver, crude oil, EUR/USD, USD/JPY, five US shares, an index, two pre-IPO contracts — and EVEDEX's trading terms put the whole list on a 24/7 schedule (18 September 2026, EVEDEX documentation). Cross margin in USDT only, at 0.015% maker / 0.045% taker ahead of cashback. - In favour: Every market documented as open 24/7; Six asset classes in one cross-margined USDT balance. - Against it: 52 markets against Ostium's wider non-crypto list; Positions written to Arbitrum in batches rather than trade by trade. - Wrong fit for: UK retail clients. ## 6. [Aevo](https://www.aevo.xyz/docs) — for a list where nearly half the markets sit outside crypto Score 58 of 100. Of 102 active perpetuals, 55 are crypto and the remaining 47 are equities, ETFs, commodities, currencies, two pre-IPO names and a market on compute ([Aevo market list](https://api.aevo.xyz/markets?instrument_type=PERPETUAL), checked 18 September 2026). Orders match off the chain and matched trades settle in contracts on a rollup Aevo runs. Rates are 0.050% maker / 0.080% taker. - In favour: 47 of its 102 markets sit outside crypto; Matched trades settle in contracts on the rollup it runs. - Against it: 0.080% taker, the dearest rate among these six; Sequencing runs through a single operator with batches posted hourly. - Wrong fit for: a trader replacing an oracle venue's equity breadth name for name. ## What Ostium alternatives change about a position Three things. Price formation moves from a feed to a book: instead of a quote derived from an oracle, a trader fills against resting orders, which can be inspected and measured — the readings put $16.5 million of BTC within 10 basis points on Lighter and $3.8 million on Aevo, six books read on one timer. Counterparty structure moves from a shared pool to other traders. And the fee model changes: pool venues charge opening and closing fees plus borrowing on the position, while order-book venues charge maker and taker rates and funding. What is usually lost is breadth. Ostium lists 43 equities, 8 ETFs, 9 FX pairs, 7 commodities and 7 indices against far shorter non-crypto lists on most order-book venues. What does not change is the size a trader is carrying. The margin behind a leveraged position is all it has, and a market that gaps can take the lot. ## The hours question, asked the other way round An oracle-priced venue inherits the underlying session by design: it quotes what the feed quotes, and Ostium's documentation queues limit orders and rejects market orders outside the window ([Ostium market reference](https://docs.ostium.com/traders/reference/markets), checked 18 September 2026). An order-book venue has to decide for itself, and what they publish covers part of a listing rather than the whole of it: Lighter and Extended state 24/7 for their real-world-asset markets, and Extended adds that the Prime markets behind a quote request halt with the underlying session, while Aster, Hyperliquid and Aevo say nothing we could find. EVEDEX states one policy for the whole list, that all 52 of its markets trade 24/7, shares and commodities included (18 September 2026, EVEDEX documentation). For a trader whose complaint about an oracle venue is the weekend gap rather than the pricing model, that is the specific thing to compare. ## How the comparison was made Every column here but one is read rather than measured. On 18 September 2026 the desk read each venue's terms and documentation for what it lists, when those markets are open, what it charges, who can move the collateral. Depth nobody publishes, so the desk took it: each BTC perpetual book read on a timer, ten minutes apart, closing 17:58 UTC on 20 September 2026. The desk keeps an account at none of them. The same five criteria, settled on 23 September 2026 and set out on the [method](/method) page, order the 6 venues scored here. The hours are the softest column here, and one page is ordered by them — a line in a venue's own document about when a market is open, not something anyone watched. Custody is read the same way. Depth is measured, but only on BTC, the one contract all of these venues run; thickness there says nothing about the XAUT book beside it. Fees are the day-one rate, nothing a trader earns back taken off. ## In their own words > "With Ostium, you keep full custody of your funds. There are no account approvals, no frozen positions, no hidden spreads, and no intermediaries." — Ostium, home page, 18 September 2026. https://www.ostium.com/ > "Stocks: Monday-Friday, 9:30 AM - 4:00 PM ET. Crypto: 24/7, 365 days." — Ostium documentation, Markets reference, 21 September 2026. https://docs.ostium.com/traders/reference/markets > "This is possible because Gains does not match buy and sell orders through an order book. Instead, trader PnL is calculated in the smart contracts and settled against the gToken vaults." — gTrade documentation, overview, 18 September 2026. https://docs.gains.trade/gtrade-leveraged-trading/overview ## FAQ ### what is ostium trading A perpetuals venue for real-world assets on Arbitrum, pricing positions against an oracle and filling them from a shared pool rather than an order book. Its documentation lists 83 markets across crypto, equities, ETFs, FX, commodities and indices, each with its own session. ### What are the best Ostium alternatives? It depends on the reason for leaving in the first place. For a resting book a trader can measure before sizing an order, Lighter scores 90 of 100 here and Extended 85. For markets that stay open when the cash session closes, EVEDEX is the venue documenting round-the-clock trading across everything it lists. ### Is an order book better than an oracle? Neither is better in general. A book shows depth a trader can inspect before sizing an order, and it can be thin. An oracle-priced pool always quotes a price but that price comes from a feed, and the pool's capacity, not the book, sets what can be filled. ### Does Ostium require KYC? Its site states there are no account approvals and that traders keep full custody of their funds. Sign-in is an email that creates a smart account, or a wallet. Its terms still bar several countries, which is the usual pattern across every venue on this page. ### Which venue has the most real-world assets? By share of the listing, the oracle-priced ones: 74 of Ostium's 83 markets sit outside crypto. By count an order-book venue can carry more — 130 of Extended's 325 markets are real-world assets, 112 of them equities. What switching costs is the even spread across classes, not the number of names. ### Can I trade gold on all of these? Most list a metals market, usually a perpetual on XAUT rather than on spot gold. Our page on [trading gold](/trade-gold-with-crypto) orders those venues by when the market is actually open, which is where they differ more than in the listing itself. ### What fees do pool-priced venues charge? A different shape: opening and closing fees on the position, plus a borrowing or rollover charge for holding it. Order-book venues charge maker and taker rates and funding instead, which makes a direct comparison harder than lining up two percentages. ### Are these venues self-custodial? Collateral sits in smart contracts on all of them, and a wallet signature is the sign-in. The real difference is whether a withdrawal can be forced when the operator is unresponsive. Lighter is the only one of the six that documents a route round an operator that has stopped answering. ### ostium trading fees Ostium charges an opening fee and a closing fee on the position, with a rollover cost while it is held, so the total depends on holding time rather than on turns. Order-book venues charge maker and taker instead: nothing at all on Lighter's default account, 0.025% to take on Extended. ### Do any of them list ETFs? Ostium does, with 8 ETF markets. Among the order-book venues on the register, Aevo is the one that lists ETFs outright — four of them sit in its market list beside 32 equities — while elsewhere an index contract stands in for the fund, and an SPY market sits among the EVEDEX contracts. ## About this sheet One published formula; every figure dated. Corrections: desk@gerhardandlinger.net. — Cross-Asset Desk Research. Edition of 24 September 2026. This desk is paid to publish, and a venue covered here may be the party that paid.