Isolated vs Cross Margin

Understanding Margin

Before comparing margin modes, let's nail down what margin actually is. In perpetual futures trading, margin is the collateral you put up to open and maintain a leveraged position. It's your skin in the game.

When you open a 10x leveraged position worth $10,000, you deposit $1,000 as margin. That $1,000 acts as a guarantee — if the trade goes against you, losses are deducted from your margin. If your margin runs out, you get liquidated.

Every exchange offers two margin modes: isolated and cross. They fundamentally change how your collateral works.

Isolated Margin: Contained Risk

With isolated margin, you assign a specific amount of margin to each position. That position can only use the margin you gave it — nothing more.

How It Works

Say you have $5,000 in your trading account. You open a long ETH position with:

• $500 isolated margin
• 10x leverage
• Position size: $5,000

If ETH drops and your position gets liquidated, you lose exactly $500. Your remaining $4,500 is completely untouched. You can open another trade immediately.

Practical Example

Account balance: $5,000

You open two isolated margin positions:

• Position A: Long BTC — $1,000 margin, 10x leverage ($10,000 position)
• Position B: Long ETH — $500 margin, 5x leverage ($2,500 position)

Remaining free balance: $3,500

Now BTC crashes 12%. Position A gets liquidated.

Result:

• Position A: -$1,000 (liquidated, margin lost)
• Position B: Unaffected, still running
• Free balance: $3,500 (untouched)
• Total account: $4,000

The damage was contained. You lost your BTC margin but everything else is safe.

Cross Margin: Shared Collateral

With cross margin, your entire account balance acts as collateral for every open position. All positions share the same margin pool.

How It Works

Same setup — $5,000 in your account. You open a long ETH position with:

• Cross margin mode
• 10x leverage
• Position size: $5,000

If ETH drops, the exchange pulls from your entire $5,000 balance to keep the position alive. Your liquidation price is much further away — but if you do get liquidated, you can lose everything.

Practical Example

Account balance: $5,000 (cross margin)

You open two positions:

• Position A: Long BTC — 10x leverage ($10,000 position)
• Position B: Long ETH — 5x leverage ($2,500 position)

All $5,000 backs both positions.

BTC crashes 12%. Instead of liquidating immediately, the exchange uses your free balance to absorb losses. But the loss keeps growing...

If BTC drops further and the combined losses across all positions exceed your total $5,000 balance, everything gets liquidated — both positions, entire balance. Gone.

The nightmare scenario: A single bad position in cross margin can drain your account and force-close your profitable positions too.

Side-by-Side Comparison

| Feature | Isolated Margin | Cross Margin |

|---------|----------------|--------------|

| Collateral | Fixed per position | Entire account balance |

| Max loss | Assigned margin only | Entire account |

| Liquidation price | Closer to entry | Further from entry |

| Risk containment | Excellent | Poor |

| Capital efficiency | Lower | Higher |

| Best for | Beginners, risky trades | Experienced traders, hedging |

When to Use Each Mode

Use Isolated Margin When:

• You're a beginner still learning the mechanics
• You're taking a high-risk or speculative trade
• You want to cap your maximum loss upfront
• You're trading multiple uncorrelated positions and don't want one to affect the others
• You're using higher leverage (10x+)

Use Cross Margin When:

• You're an experienced trader who understands the full risk
• You're running a hedged strategy (e.g., long BTC, short ETH) where positions offset each other
• You need maximum capital efficiency and want your liquidation price as far away as possible
• You're confident in your position and want to avoid unnecessary liquidations from small wicks

The Beginner's Rule

Start with isolated margin. Always. You can always add more margin to a position manually if needed. But you can never un-lose money that cross margin drained from your account.

Think of isolated margin as putting money in separate envelopes. If one envelope gets stolen, the others are safe. Cross margin is carrying all your cash in one wallet — convenient, but if you lose it, you lose everything.

With margin modes understood, you now have the foundational knowledge to start trading perps responsibly. Always know your margin mode, your leverage, and your maximum possible loss before you enter any trade.