Isolated vs Cross Margin: Which Mode Fits Your Risk?

Two traders open the same position, same size, same leverage, same entry. The market turns against both of them in the same way. One loses the margin behind that single trade and keeps the rest of the account. The other watches the move pull on every other open position until the account itself is under pressure.

Same trade. Different margin mode.

Our guide to leverage and margin explained how much of your balance a position ties up, and deliberately left one question open: which part of your balance that is. This piece picks up exactly there. It stays provider-neutral on the mechanics, then looks at what margin mode does and does not change once you trade under a prop firm's rules.

What Margin Mode Actually Decides

Every leveraged position needs collateral behind it. Margin mode answers a single question about that collateral: where does it come from, and where does it stop?

Two answers matter here. In isolated mode, a position gets its own dedicated pot of margin, separate from the rest of your account. In cross mode, positions draw on one shared pool, the available balance of the account as a whole.

That sounds like bookkeeping. It is not. Margin mode decides what a loss reaches. It sets the boundary a bad trade runs into, and it changes when and how a position gets closed for you.

Keep one thing separate from the start. Margin mode does not change your profit or loss on a given price move. A position of a given size gains or loses the same dollar amount whichever mode backs it. What changes is the buffer around that position, and how far the damage can travel when the buffer runs out.

How Isolated Margin Works

With isolated margin, you commit a specific amount of collateral to one position. That amount, and only that amount, stands behind it.

As the trade moves against you, unrealized losses eat into that dedicated margin. When the remaining margin falls to the maintenance level for that position, the position is closed. The rest of your balance is not touched, and neither are your other positions. The loss is capped at what you put behind the trade, plus the costs of closing it.

That cap is the whole appeal. You know the worst case before entering. You decide how much a single idea is allowed to cost, and the mode enforces it mechanically instead of relying on your discipline in the moment.

The price of that certainty is a thinner buffer. Because only the assigned margin backs the position, a smaller adverse move can end it than if your full balance were standing behind it. A position that is walled off is also cut off from help: unrealized profit sitting in another trade cannot rescue it.

On venues that allow it, you can add margin to an isolated position after it is open. Doing so moves its forced-close point further away, but it is still a manual decision, made under pressure, with money that was previously safe elsewhere in your account.

That is the quiet trap in isolated mode. The cap only protects you if you leave it where you set it.

How Cross Margin Works

With cross margin, there is no dedicated pot. Every open position draws on the same shared balance, and the venue looks at the account as one unit.

That changes the arithmetic of a losing trade. As one position moves against you, it can lean on your free balance, and on unrealized profit in other positions, before it reaches the maintenance level. The buffer behind each trade is as wide as the account allows. That is real room. A move that would have ended an isolated position can pass without a forced close.

The same property works in the other direction. In cross mode, one loss reaches everything. A position that keeps falling keeps drawing on the shared balance. If the account's equity drops below what all open positions need to stay open, the venue starts closing positions, and it is not limited to the one that caused the problem.

Cross margin also makes each forced-close point a moving target. Because every position shares the same collateral, the distance to a forced close on one trade depends on what your other trades are doing. A winning position can push that point further away. A second losing position can pull it closer, even if the first trade has not moved at all.

The Same Trade Under Both Modes

Picture an account with two open positions. The first is a small, steady trade that is slightly in profit. The second is a larger trade that starts to move hard against you.

Under isolated margin, the larger trade has only its own margin behind it. If the move continues, that position reaches its maintenance level and is closed. You lose the margin you assigned to it. The small trade keeps running, and the rest of your balance is exactly where it was.

Under cross margin, the larger trade first draws on the shared pool. It uses your free balance and the small trade's unrealized profit as cushion, so it survives a move that would have ended it in isolated mode. If price turns back, that cushion was the difference between a forced close and a trade that came back. If price keeps going, the losses keep drawing on the same pool. Eventually the whole account runs short of the margin all positions need, and the venue may close the small trade too.

Neither result is the correct one in general. The first protects the account from one idea. The second gives one idea more room to be right.

The Trade-Offs, Side by Side

Everything above comes down to a few pairs of opposites.

Read those rows as a choice between two kinds of risk. Isolated margin trades a narrower buffer for a known ceiling on each position. Cross margin trades that ceiling for a wider buffer and a shared fate.

What to Weigh Before You Pick a Mode

This is not a recommendation for either mode. The useful move is to know which trade-off you are accepting before you pick one.

The number of open positions. With a single position, the difference between the modes narrows: the shared pool and the dedicated pot back the same trade. With several positions, the difference becomes the whole point.

How related your positions are. Several positions that tend to move together behave like one larger position under cross margin. A move against all of them draws on the same pool at the same time.

A hard stop per idea, or a buffer for the account. Isolated mode caps each trade at its assigned margin. Cross mode lets the account's full balance stand behind whichever trade needs it.

How closely you will watch. A trade on cross margin can drift closer to a forced close because of something happening in a different position. That demands attention to the whole account, not just the trade you are looking at.

Whatever you decide, a forced close by the venue is a crude exit. Where you place a stop relative to your entry is a more deliberate answer to "how much can this trade cost me" than the maintenance level of either mode.

What Margin Mode Does Not Change on a Funded Account

Everything so far describes how a venue treats collateral. Trading under a prop firm adds a second layer of rules that sits above the venue, and margin mode does not reach it.

When a prop firm measures its loss limits on account equity, that means your balance plus the unrealized profit and loss of everything open. That is an account-wide number. Walling a position off in isolated mode caps what a venue liquidation can take from it. It does not wall off the firm's limit. An unrealized loss on an isolated position still counts against your account equity, exactly as it would under cross margin.

That has a practical consequence. Depending on your leverage and position size, the firm's equity limit can sit closer than the venue's forced-close point. In that case the limit, not the liquidation, is the wall you hit first, and choosing isolated mode for a single position does nothing to move it.

The same logic applies to the drawdown rules in general. Our explainer on what a drawdown is in trading walks through how equity-based limits are measured, and why they are about the account, not a single trade.

It also applies to the costs that accrue while you hold a position. Funding payments on a perpetual settle into the same equity your limits are measured against, whichever margin mode the position uses.

On CarrotFunding, liquidation itself follows standard perpetual-futures mechanics: a position is liquidated once losses erode the required maintenance margin for that market. The venue-side details, including limits per asset, are described on our Hyperliquid venue page.

Common Misreadings

"Isolated margin is the safe mode." Not quite. It is the bounded mode. Its buffer per position is narrower, so an isolated trade can be closed by a move that a cross-margined trade would survive. Safer for the account, less forgiving for the individual trade.

"Cross margin means I can't be liquidated." Wrong, and costly. A wider buffer is not an unlimited one. Cross margin postpones a forced close by lending a position the rest of the account, and when it finally happens, it can take more with it.

"Margin mode changes my risk per trade." Only partly. Position size decides what a price move costs you in dollars. Margin mode decides where the forced close sits and which money it reaches. Treat those as two separate settings.

"On a funded account, isolated positions are ring-fenced." From the venue's point of view, yes. If the firm's limit runs on account equity, it still counts every open position.

Conclusion

Isolated and cross margin do not make a trade more or less likely to work. They decide what happens when it does not: whether a single position fails on its own, or whether the whole account absorbs it first and pays for it later.

The choice depends on how many positions you hold, how closely they move together, and whether you would rather cap each idea or cushion the account. On a funded account, remember the layer above the venue. An equity-based limit counts every open position, so no margin mode replaces sizing each trade against that limit.