What Are Isolated Margin and Cross Margin?

Jun 18, 2026

Isolated Margin and Cross Margin are two margin management modes in perpetual contracts. Isolated Margin allocates a fixed, independent margin to each position — losses are capped at that position's margin. Cross Margin uses all available funds in the account as a shared margin pool — positions can support each other, but risks are also interconnected.

Why It Matters

Choosing the wrong margin mode can turn a small, controllable loss into a large account-wide drawdown. For Perps beginners, Cross Margin can seem "safer" because a single position is harder to liquidate, but in reality it may expose the entire account to risk. Understanding the fundamental difference between the two modes is essential for disciplined position management. Hyperliquid margin mode documentation provides detailed protocol-level explanations.

Core Mechanics and Key Concepts

Isolated Margin

In Isolated Margin mode, you allocate a fixed amount of margin separately to each position. The maximum loss on that position is capped at the margin you assigned to it — even if it is fully liquidated, other positions and the remaining account balance are unaffected.

Example:

Account balance: 1,000 USDC
Allocate 200 USDC isolated margin to a BTC long position
Allocate 150 USDC isolated margin to a TSLA short position
If the BTC long is liquidated, the maximum loss is 200 USDC — the TSLA position and the remaining 650 USDC are unaffected

Best suited for: Holding multiple positions in different directions simultaneously; being uncertain about the risk of a specific position; wanting precise control over the maximum loss of an individual position.

Note: In Isolated Margin mode, to avoid liquidation you must manually add margin to the position. Account balance will not be drawn automatically.

Cross Margin

In Cross Margin mode, all available balance in the account serves as a shared margin pool for all positions. When one position incurs losses, the system automatically draws from the account balance to keep that position above its liquidation threshold — at the cost of exposing all funds in the account to that position's losses.

Example:

Account balance: 1,000 USDC (Cross Margin mode)
Simultaneously holding a BTC long and an ETH long
If the BTC position incurs a large loss, the system automatically draws from ETH's "available margin" to prevent BTC from being liquidated
If both positions lose in the same direction, the entire 1,000 USDC account balance may be consumed

Best suited for: Multiple positions in the same direction (e.g., all long) where risks are aligned; advanced users with hedged portfolios where gains and losses offset each other.

Note: Liquidation in Cross Margin mode occurs at the account level — when total account net value falls below the maintenance margin requirement, all positions may be liquidated simultaneously.

Core Differences Between the Two Modes

Dimension	Isolated Margin	Cross Margin
Margin scope	Independent per position	Shared across full account
Maximum loss cap	Margin allocated to that position	Entire account balance
Liquidation trigger scope	Single position	Entire account
Auto top-up	No (requires manual action)	Yes (automatically draws from balance)
Risk isolation between positions	High	Low
Suited user type	Beginners / multi-directional holders	Advanced users with hedging strategies

Liquidation Price Calculation Differences

In Isolated Margin mode, the liquidation price is calculated from the allocated margin and leverage — it is relatively fixed. In Cross Margin mode, the liquidation price adjusts dynamically as the account balance changes — the larger the balance, the further the liquidation price from the entry price, but this also means more capital is at risk. CME education resources provide traditional finance context on futures margin mechanics.

Use Cases

Beginners — choose Isolated Margin: Clear knowledge of the maximum loss on any given trade, with defined psychological expectations. A single misjudgment does not affect the whole account.
Multi-strategy traders — use Isolated Margin: Going long TSLA and short NVDA simultaneously — the two positions carry independent risk without interfering with each other.
Hedging strategy — use Cross Margin: Holding spot BTC long while opening a BTC Perps short. The gains and losses on both sides can offset each other in the Cross Margin account, reducing overall liquidation risk.
Advanced arbitrage strategies: Delta-neutral portfolio users find Cross Margin more capital-efficient across multiple positions, avoiding idle capital.

Access via OneKey App

OneKey provides complete access to on-chain Perps markets. After connecting to Hyperliquid or other protocols through the OneKey App, users can select Isolated Margin or Cross Margin mode on the order entry screen, and view real-time margin rates and liquidation prices for each position. OneKey uses a self-custody architecture — private keys are stored locally, and users retain full control over their account funds. Visit the OneKey website to learn more about wallet and trading features.

Risks and Considerations

Cross Margin risk is underestimated: Many beginners assume Cross Margin is "safer" because it is harder to liquidate a single position. In reality, once losses expand under Cross Margin, the entire account balance is drawn in — total losses may far exceed expectations.
Isolated Margin requires active management: Isolated Margin does not auto-top-up. If prices continue moving against you without adding margin, the position will be liquidated.
Mode switching restrictions: Some protocols do not allow switching margin modes while a position is open. Confirm before opening a position.
Cascading liquidation under Cross Margin: During extreme market volatility, a Cross Margin account may see multiple positions liquidated simultaneously — losses can materialize very rapidly.
Compounding leverage risk: Regardless of mode, high leverage brings the liquidation price closer to the entry price, making risk management more challenging. Reference Ethereum DeFi overview for an overall on-chain derivatives risk framework.

FAQ

Q1: Should beginners use Isolated Margin or Cross Margin? Isolated Margin is strongly recommended for beginners. The maximum loss is predictable, risk boundaries are clear, and a wrong call does not affect other funds in the account.

Q2: Can I add margin to an Isolated Margin position while it is open? Yes. Most protocols allow manually adding margin to an Isolated Margin position to reduce liquidation risk. However, adding margin also means increasing risk exposure — evaluate carefully before doing so.

Q3: In Cross Margin mode, can a profitable position prevent another position from being liquidated? Yes. In Cross Margin mode, the total account net value is the shared margin for all positions. Unrealized gains on one position can provide a buffer for another losing position. This is the advantage of Cross Margin for hedging strategies.

Q4: How do I calculate the liquidation price in Isolated Margin mode? Liquidation price = Entry price × (1 - 1/leverage + maintenance margin rate) (for long positions). The exact formula depends on the protocol. Refer to the Hyperliquid documentation for detailed calculation methods.

Q5: Does the funding rate affect the liquidation price? Yes. Funding rates are deducted from the margin account, reducing the effective available margin — equivalent to moving the liquidation price closer to the entry price. The cumulative effect of funding rates over long holding periods should not be overlooked.

Take Action

Before participating in Perps trading, check current contract prices and funding rates in the OneKey App and familiarize yourself with Isolated Margin and Cross Margin operating rules in the Hyperliquid official documentation. Start with a small Isolated Margin position to build experience, then gradually scale up only after truly understanding the liquidation mechanics. For more on-chain tools and educational resources, visit the OneKey website.