How to Use Portfolio Margin Across Multiple Positions on ApeX

Portfolio (cross) margin on ApeX means a winning position’s unrealized profit can directly cover a losing position’s shortfall, genuinely useful for a hedged book, but it also means one severely losing position can erode the collateral backing everything else you hold.

This guide is part of TradeOnDEX’s ApeX Protocol how-to series within Perpetual Futures, extending the cross-collateral guide’s coverage to how margin gets shared across positions.

Disclosure: TradeOnDEX may earn a commission from links to ApeX on this page, at no extra cost to you. Full details at the end of this article.

How cross (portfolio) margin actually works

Under cross margin, your entire account equity acts as margin for any open trades, unrealized profit and loss across positions is aggregated, so a winning position’s gains can offset a losing position’s deficit, extending how long that losing position can stay open before facing liquidation. This means for you, concretely: cross margin pools your collateral across every open position rather than isolating each one, maximizing capital efficiency by using one shared margin pool for multiple markets.

Where this genuinely helps: hedged positions

Cross margin is particularly useful for a hedged portfolio, for example, a long BTC-PERP position alongside a short ETH-PERP position. Because P&L is treated in aggregate, a temporary divergence between the two positions doesn’t knock one side out as easily as it would under isolated margin, where each position’s risk is walled off separately.

How to use it, step by step

1. Deposit collateral into your account, as covered in the cross-collateral guide, this becomes your shared margin pool under cross margin.
2. Open multiple positions across different markets, understanding they’ll share this same collateral pool by default under cross margin.
3. Monitor your positions’ combined P&L and overall account equity, rather than tracking each position’s isolated margin requirement independently.
4. If you want a specific position’s risk contained separately instead, consider isolated margin for that position, per ApeX’s own comparison of the two modes.

Risk: what pooled margin actually costs you

Severe losses in one position can erode collateral backing every other position you hold. This is the direct trade-off for cross margin’s capital efficiency, a single badly-losing position doesn’t just risk itself, it draws down the shared pool that’s also supporting your other open trades.

Managing total exposure and correlation across positions matters more under cross margin than isolated margin. A domino effect across your entire account is a real risk if multiple positions move against you simultaneously, particularly if they’re more correlated than you assumed, cross margin rewards genuinely hedged, low-correlation books and punishes concentrated, correlated ones more severely than isolated margin would.

Pooled margin can mask how close an individual position actually is to trouble. Because losses in one position can be quietly absorbed by gains in another, you may not notice a specific position’s own deteriorating risk profile as clearly as you would if it were isolated and visibly approaching its own margin threshold.

A shared pool being depleted risks cascading liquidations across multiple positions at once, not just one. Once the aggregate collateral pool runs out, the effect isn’t contained to a single losing position, it can trigger liquidation pressure across everything sharing that pool simultaneously.

Cross margin vs. isolated margin, at a glance

See it for yourself

Before running multiple positions under cross margin, review how correlated they actually are, a genuinely hedged pair benefits meaningfully from pooled margin, while several correlated bets in the same direction concentrate risk rather than diversify it. You can review current margin settings at apex.exchange.

Frequently asked questions

Does cross margin protect me from losing money on a bad position?

No, it can extend how long a losing position stays open by drawing on your account’s other equity, but it doesn’t eliminate the underlying loss; it changes how that loss interacts with your other positions’ collateral.

When does portfolio margin work best?

For genuinely hedged, low-correlation position pairs, where one position’s gains can meaningfully offset another’s temporary losses without both moving against you simultaneously.

What’s the biggest risk of cross margin versus isolated margin?

A severely losing position can erode the shared collateral pool backing your other open positions, potentially triggering cascading liquidation pressure across multiple positions rather than containing the loss to one.

Can I use isolated margin for one position while using cross margin for others?

Per ApeX’s own comparison, isolated margin is available as an alternative for a specific position you want risk-contained. Check the current interface for how granularly you can mix the two modes.

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