What is Rhythm

Rhythm is a perpetuals exchange built natively on Robinhood Chain. It was the first DEX live on the chain and it is built for one job: giving traders direct, self-custodial access to the world's deepest markets. Crypto, forex, commodities, indices and equities, 75 markets in total, all settled on-chain in USDC.

Rhythm is the venue. The liquidity underneath it comes from Ostium, the liquidity layer that has cleared more than $50B in cumulative volume with over $300M in peak open interest. We did not build our own market maker or bootstrap a thin order book. We plugged the interface into an engine that already prices and clears these markets at institutional depth, and we put it on the fastest rails available.

The division of labor is simple. Robinhood Chain provides execution rails: sub-second finality, gas measured in fractions of a cent, records posted to Ethereum. Ostium provides the liquidity layer: pooled USDC depth, oracle pricing, hedging and settlement mechanics. Rhythm provides the venue: order entry, portfolio, risk display and the market surface.

Rhythm is an independent protocol deployed on Robinhood Chain. It is not issued or endorsed by Robinhood Markets, Inc.

Why Robinhood Chain

Most perp DEX front ends are chain-agnostic by design and it shows. Rhythm went the other way. The interface assumes Robinhood Chain's properties end to end: blocks confirm faster than a price tick, so the UI never shows you a stale position; gas is ETH-denominated and effectively free, so stop-loss updates and partial closes are not decisions you ration; and the chain settles to Ethereum, so the security budget is not ours to invent.

Being native also means being where the flow is. Robinhood Chain launched with tokenized equities as its flagship asset and an audience that thinks in tickers. Rhythm lists accordingly: HOOD/USD, NVDA/USD and 33 more US stocks sit next to BTC/USD and EUR/USD as first-class markets, not an afterthought tab.

The chain's native perp DEX

"Native" is a word most protocols use loosely, so here is what it means in Rhythm's case. Rhythm is not a multichain deployment with a Robinhood Chain instance bolted on. The contracts live on Robinhood Chain, the venue went live with the chain itself, and it was the first DEX operating there. There is one deployment, one canonical order flow and one place your positions settle. A bridged front end pointing at contracts on another network cannot make that claim, and the difference is not cosmetic.

Perpetuals are the asset class that punishes slow rails hardest. A liquidation that lands two blocks late is a bad debt event. Funding that accrues per block needs blocks that actually arrive on time. An oracle that prices on demand needs its price request and its fill inside the same breath of the chain. Rhythm's mechanics assume Robinhood Chain's cadence because they were built against it: sub-second finality keeps keeper liquidations inside the risk envelope, and gas at a fraction of a cent makes tight stop management rational rather than expensive. Running the same machinery on slower or costlier rails would mean widening every risk parameter to compensate. Being native is what lets the parameters stay sharp.

There is also a structural fit. Robinhood Chain is where tokenized equity flow concentrates, and a chain whose users hold tokenized stocks is a chain whose users want to hedge, short and lever those same names. Rhythm is the venue for that: the spot ecosystem and the derivatives layer share rails, so the chain's equity audience gets its leverage on home ground instead of bridging out. First on the chain matters less as a trophy than as a head start on that alignment, and it is one we intend to keep.

To be precise about the name: native to Robinhood Chain, the network. Rhythm is independent of Robinhood Markets, Inc. and neither issued nor endorsed by it.

Why Ostium

Liquidity is the part of an exchange you cannot fake. A venue can have a fast chain and a clean interface and still fill you against a shallow pool at a price nobody in the real market would honor. So we made a build-versus-integrate call early: Rhythm runs on Ostium as its liquidity layer, the same engine behind the largest RWA perps market on-chain.

What that buys traders, concretely: one shared USDC pool backs every market instead of fragmented per-pair books, pricing comes from a consensus oracle fed by primary market data, and directional flow is hedged with institutional counterparties rather than warehoused against you. Fills on Rhythm track fills in the underlying market because the underlying market is where the risk actually ends up.

Institutionally hedged equity exposure

It is worth being precise here, because most on-chain equity products fall into one of two categories: a synthetic price feed with no market behind it, or a wrapped token with unresolved custody questions. Rhythm's equity markets are neither.

When you open NVDA/USD on Rhythm, the position is mirrored one-to-one at open through Ostium's hedging layer, with Jump Trading as flagship hedging partner. The desk carries an equal and opposite position in the underlying market, so the protocol remains net flat and your counterparty exposure does not reduce to the solvency of a pool. Execution happens at the prevailing bid and ask, sourced from live institutional equity data, within the underlying market's session. That last detail is the tell: our stock markets keep NYSE hours, enforce day-trading leverage tiers and auto-close over-levered positions at 3:45 PM ET, because there is an actual closing bell on the other side of your trade. Simulated markets do not need closing bells.

Positions settle in USDC. You get the full economics of the underlying equity, long or short, with leverage, without a brokerage account. You do not receive shares, dividends or votes; this is a derivatives venue, not a transfer agent, and we would rather state that plainly than bury it in a footnote.

The OLP and the buffer

The Ostium Liquidity Pool (OLP) is the USDC vault that backstops every market. LPs deposit USDC and receive OLP tokens; 30% of opening fees flow to the pool as yield at daily settlement.

The pool's loss protection is structured like a credit waterfall. A junior buffer, capital posted by Ostium affiliates and partners, absorbs trader P&L first and in full. OLP sits senior and is only reachable after the buffer is gone. When traders win, the vault pays instantly on-chain and the offchain hedge books a matching gain; when traders lose, the buffer grows. Once a day a settlement run moves USDC between the vault and the hedging book to restore the buffer to target. Intraday the vault balance breathes; the protocol stays net flat across both books.

Oracle pricing

Prices come from a purpose-built consensus oracle rather than a single feed. Independent publishers each pull underlying market data, compute and sign a price, and the signatures reconcile into one consensus value published on-chain, fetched on demand at the moment your order executes.

Crypto pairs are normalized from live order books across major exchanges. Stocks, forex, commodities and indices aggregate multiple institutional market data providers with sub-second updates. Every price request costs a flat $0.10 USDC oracle fee, which is refunded when you fully close the position.

Markets and hours

75 markets across six asset classes. Hours and leverage follow the underlying market, not a synthetic 24/7 clock.

Per-pair caps, fees and open interest are listed live on the Markets page.

Opening a trade

Collateral is USDC only. Minimum collateral is pair-specific, typically $10 to $100 USDC. Position size is collateral times leverage, capped per pair.

A worked example. You open a 10x long on ETH/USD with 1,000 USDC:

Market orders fill at the current ask (longs) or bid (shorts) at the oracle consensus price. Opening fees run 3 to 5 bps of notional depending on the pair.

Order types

Market, limit and stop orders for entry. Take-profit and stop-loss attach to any position and execute permissionlessly through decentralized keepers, as do liquidations. Nothing about your exit depends on our servers being up. Limit and stop placements incur the $0.10 oracle fee per price request, capped at 10 USDC per transaction.

Fees and funding

There are four costs to know. Opening fee: 3 to 5 bps of notional, once, at entry; 30% goes to OLP. Oracle fee: flat $0.10 per price request, refunded on full close. Closing fee: none. Displayed P&L is realized P&L. Rollover: the carry cost of holding the position, accrued continuously per block with rates updated daily.

Rollover is two-sided and derived from the underlying market's term structure: futures curves for commodities, forex and crypto, SOFR for stocks, ETFs and indices, plus a broker premium of roughly 1 to 2% annualized. That means carry can pay you. When WTI trades in steep backwardation, longs have collected close to 38% annualized while shorts paid around 42%. The interface shows the live net rate for each side before you open.

Liquidation

The liquidation threshold scales with how much of the pair's max leverage you are using:

Threshold (% of collateral lost) = 100% − (your leverage / pair max leverage × 25%)

At full max leverage the position liquidates at a 75% loss of collateral. At lower leverage the threshold sits deeper. With 1,000 USDC on a 200x-max pair: 5x liquidates around a 19.9% adverse move, 20x around 4.9%, 200x around 0.4%.

Liquidation is total. Remaining collateral is retained by the protocol and there is no partial recovery, so the practical advice is the same as on any serious venue: set a stop-loss above your liquidation price (longs) or below it (shorts) and let the keeper network do the rest. There is no separate liquidation fee and keeper gas is not your problem.

Stocks and day trading

Equity markets carry two leverage tiers because the underlying market closes. Intraday, from 9:35 AM to 3:45 PM ET, stocks run up to 100x. Overnight caps are lower, typically 5x to 20x per name. At 3:45 PM ET, any position levered above its overnight cap auto-closes at prevailing rates. No grace period, no extension. If you want to hold through the close, open at or below the overnight cap or deleverage before the deadline. Expect slippage risk on thinner names into the auto-close window.

Closing a trade

Close manually at market, or let TP/SL do it. Full closes refund the oracle fee and charge nothing else; what the interface shows as P&L is what settles to your wallet in USDC.

Rhythm never holds funds. Collateral sits in audited smart contracts, every order and fill is a transaction you sign, and liquidations and automated orders run through permissionless keepers. If the interface disappeared tomorrow your positions would not: they live on-chain and remain manageable by direct contract interaction.

Security inherits from the stack. Robinhood Chain posts records to Ethereum. The liquidity layer's contracts are audited with published source. The oracle requires consensus across independent signed publishers, so a single corrupted feed cannot print a liquidating price.

Rhythm is not available to persons in the US, UK, Russia or OFAC-listed jurisdictions. Access from restricted regions is blocked at the application layer. Nothing in these docs is an offer of services in any restricted jurisdiction, and nothing here is investment advice. Leveraged trading can lose your entire collateral.

Is Rhythm part of Robinhood?
No. Rhythm is an independent protocol and the native perp DEX of Robinhood Chain, the L2 Robinhood launched on the Arbitrum Orbit stack. Native to the chain, not affiliated with the company. One deployment, on one chain, live since the chain itself.

What stands behind the equity markets?
Every position is mirrored one-to-one through the institutional hedging layer at open, priced from live equity market data, and bound by the underlying market's session hours. What you hold is a USDC-settled contract on the price, not the share certificate: full price exposure, institutionally hedged, with no brokerage account, dividends or voting rights.

Why do stock positions auto-close at 3:45 PM ET?
Because the underlying market closes at 4:00 PM ET and over-levered overnight gaps are how synthetic venues die. Positions above the overnight leverage cap close 15 minutes before the bell. Positions at or below the cap hold as long as you like.

What is the minimum trade?
Pair-specific minimum collateral, typically $10 to $100 USDC, plus the flat $0.10 oracle fee per price request.

Do I pay funding?
You pay or receive rollover depending on side and the underlying market's carry. Check the net rate for each side in the trade ticket; it updates daily and accrues per block.

What happens if the Rhythm UI goes down?
Nothing, from the protocol's point of view. Keepers keep enforcing TP, SL and liquidations, and positions remain manageable through direct contract calls.

Do I need an account?
No account and no KYC on the venue. A wallet, USDC for collateral and a trivial amount of ETH for gas. Regional restrictions apply.