Isolated vs Cross Margin: Which Should You Use?

Every futures exchange asks you to pick a margin mode before you open a position, and most traders pick whichever one was selected by default. That is a mistake, because the choice decides what happens to the rest of your account when a trade goes badly wrong. This guide explains the two modes, how liquidation behaves in each, and when each one makes sense.

The one-sentence difference

• Isolated margin: each position has its own fixed pot of collateral. If it is liquidated, you lose that pot and nothing else.
• Cross margin: all positions share your available futures balance. A losing position can draw on everything in the account to stay open.

Isolated margin in practice

Suppose you have $2,000 in your futures wallet. You open a $5,000 ETH long at 10x on isolated margin, which assigns $500 of collateral to it. The other $1,500 is untouched.

If ETH falls roughly 9–10% (the exact figure depends on maintenance margin and fees), the position is liquidated. You lose about $500. Your balance is now around $1,500, and any other positions are unaffected.

The benefits are clear: the worst case is known in advance, and one bad trade cannot take the account with it. The drawback is that liquidation comes relatively close to entry, because only the assigned collateral is protecting the position. You can add margin manually to push liquidation further away, but that is a decision you have to make deliberately — and adding margin to a losing trade is often the wrong decision.

Cross margin in practice

Same account, same trade, but on cross margin. The position still requires $500 of initial margin, but now the full $2,000 balance stands behind it. Liquidation is far further away: ETH would need to fall around 40% (roughly $2,000 of loss on a $5,000 position, minus maintenance margin) before the exchange steps in.

That sounds safer, and in one narrow sense it is — short wicks are much less likely to liquidate you. But look at the worst case: if the trade does run all the way to liquidation, you lose almost the entire account, not $500.

Cross margin also links your positions together. Unrealised profit on one position supports the others; unrealised loss on one position reduces the room the others have. Three correlated altcoin longs on cross margin during a market-wide drop behave like one large position sharing one liquidation fate.

Liquidation behaviour compared

• Distance to liquidation: closer on isolated, further on cross.
• Loss if liquidated: limited to assigned margin on isolated; potentially the whole balance on cross.
• Interaction between trades: none on isolated; full on cross.
• Effect of adding funds: depositing to the wallet does nothing for an isolated position unless you add it to that position; on cross, a deposit automatically pushes every liquidation price further away.

The part that matters more than the mode

If every position has a stop-loss placed at a logical level, and that stop is well inside the liquidation price, the margin mode mostly stops mattering. Your loss is set by the stop, not the liquidation. With a $5,000 position and a stop 2% away, you lose about $100 whether you are on isolated or cross.

Margin mode matters most in the situations you hope never to face: a missing stop, a stop that slips in a violent move, an exchange outage, or a moment of indiscipline where you move the stop. In those moments, isolated margin caps the damage and cross margin does not.

Choose your margin mode for the day your plan fails, not for the day it works.

When each makes sense

Isolated margin is the sensible default for most traders, especially when:

• you are using meaningful leverage (roughly 10x and above);
• you are trading volatile altcoins that can gap sharply;
• you run several positions at once and want each one ring-fenced;
• you are still building consistent habits around stops.

Cross margin can make sense for experienced traders who:

• run hedged or offsetting positions, where one side's profit genuinely supports the other;
• use low effective leverage across the whole account;
• always use hard stop-losses and keep only the capital they are prepared to risk on the futures wallet.

A practical setup

1. Keep only your trading capital in the futures wallet; hold the rest elsewhere.
2. Use isolated margin by default.
3. Size each position from risk: for a 1% risk on $2,000 with a 2% stop, the position is $1,000.
4. Choose leverage so that liquidation sits at least twice as far away as your stop.
5. Never add margin to rescue a trade that has invalidated. Let the stop do its job.

Leveraged trading carries a high risk of loss. This article is educational and is not financial advice.