One Position or Your Whole Account?

Isolated margin caps a leveraged position's risk to the collateral assigned to that position alone — lose it all, and the rest of the account is untouched. Cross margin pools the entire account balance as shared collateral across every open position, which can rescue a losing trade from a nearby win but also means one bad position can draw down funds committed to others. For a single manually-watched trade, this is mostly a preference. For a bot — or several bots — running unattended, it's a structural decision about how failure is allowed to spread.

TL;DR

• Isolated margin: risk capped to the collateral assigned to that specific position; a liquidation there doesn't touch the rest of the account
• Cross margin: the whole account balance backs every open position, so a losing trade can draw on funds meant for others
• Cross margin lowers the liquidation risk of any single position but raises the ceiling on how much one bad trade can cost
• Running several bots on cross margin means they're no longer independent risks — one bot's drawdown can fund another's margin call
• Some venues don't offer a choice: EVEDEX, for example, runs futures positions on cross-margin by design

What Isolated Margin Actually Isolates

Isolated margin assigns a fixed amount of collateral to one position and nothing else. If that position moves against you far enough, it gets liquidated — and the loss stops there, at the collateral you assigned. Everything else in the account, including other open positions, is untouched by that specific liquidation.

The trade-off is that isolated margin gives a position less room to survive a temporary adverse move. Because it can't draw on the rest of the account's balance, a position sized too tightly can hit its liquidation price on a move that a better-funded position would have absorbed. Sizing and range checks before launch cover how to avoid that specific mistake regardless of which margin mode a bot runs on.

What Cross Margin Actually Shares

Cross margin pools the account's full available balance as collateral behind every open position at once. If one position starts losing, it can draw on the margin backing other positions — and on uncommitted balance sitting in the account — to stay open longer than an isolated position would.

That sounds like a pure upside, and for a single position it mostly is: cross margin generally pushes a position's liquidation price further away than the same position would have in isolation. The cost shows up when something actually does go wrong. A liquidation under cross margin isn't contained to one trade's collateral — it can pull from balance backing other positions, and in a bad enough move, from the account's full pooled equity.

Why This Matters More With Bots Than With Manual Trades

A trader watching one manual position can react to a margin call — add funds, close the trade, adjust size. A bot doesn't do that. It runs the configuration it was given until a rule fires, and if that rule is "the account's margin ran out," the account finds out after the fact, not before.

That gap between manual and automated trading is also where running more than one bot changes the picture. Two or three bots on isolated margin are genuinely separate risks — each one's worst case is capped at its own assigned collateral, exactly as designed. The same bots on cross margin are not separate anymore: they're drawing on one shared pool, and a severe drawdown in one can eat into the margin keeping the others open. A capital allocation framework for running several bots without one position quietly becoming the whole account covers the sizing side of this; margin mode is the other half of the same question.

Which Mode Fits Which Setup

Isolated margin suits a bot running with defined, known-in-advance risk: a fixed collateral amount, a clear worst case, no dependency on how the rest of the account is doing. It's the more conservative default for a single leveraged bot, and it's the mode that keeps a losing bot's damage contained while other strategies keep running unaffected.

Cross margin suits a setup where a trader deliberately wants positions to support each other — for example, a hedge where one position's gain is meant to offset another's loss, and both drawing on the same pool is the point rather than a side effect. It's harder to justify as a default for several independent, uncorrelated bot strategies, since it quietly links their fates together even when nothing about the strategies themselves is related.

Not every venue leaves this as a choice. On EVEDEX, futures positions run on cross-margin by design — all positions share a common balance rather than each holding separate collateral, which is a structural fact of the venue rather than a setting to toggle. A trader running COMBO or DCA Futures bots there is working within cross-margin's trade-offs regardless of preference, which makes the sizing and monitoring habits below more important, not less.

The Cascade Risk Worth Watching For

The failure mode specific to cross margin with multiple bots running is a cascade: one position moves hard enough against a bot to threaten liquidation, the account's shared margin covers it by drawing down balance, and that draw-down brings a second, otherwise-healthy position closer to its own liquidation point than it would have been on its own. The mechanics of how liquidations cascade apply with extra force here, since a multi-bot cross-margin account effectively links every position's survival to the account's total equity rather than to its own.

The practical response isn't necessarily avoiding cross margin — it's knowing which mode is actually running before assuming a bot's risk is capped at what was allocated to it. A trader who sizes each bot as if it's isolated, while the account is actually running cross margin, is underestimating exposure by exactly the amount the other bots could draw down.

FAQ

What's the difference between cross margin and isolated margin? Isolated margin caps a position's risk to the collateral specifically assigned to it; a liquidation there doesn't affect the rest of the account. Cross margin shares the full account balance as collateral across all open positions, so a loss on one position can draw on funds backing others.

Which is safer for bot trading, cross or isolated margin? Isolated margin generally caps downside more predictably, since each bot's worst case is limited to its assigned collateral. Cross margin can reduce the liquidation risk of any single position but removes the separation between bots, so a severe loss on one can affect the margin available to others.

Does running multiple bots change which margin mode makes sense? Yes. On isolated margin, several bots remain independent risks with separate worst cases. On cross margin, they share one pool of collateral, so a large drawdown in one bot can bring another bot closer to liquidation even if that second bot's own trade is performing as expected.

Can I choose isolated margin on every exchange? Not always. Some venues run cross-margin by design rather than offering a choice — EVEDEX futures positions, for example, share a common balance across all open positions rather than holding separate collateral per position.

Does cross margin always mean higher risk than isolated margin? Not for a single position in isolation — cross margin typically pushes that position's liquidation price further away by giving it access to more collateral. The added risk shows up at the account level, in how much a bad position can draw from funds meant for other positions.