Same trade, two very different risks
Margin mode is the setting traders click past without reading, and it quietly decides the two things that matter most: where you get liquidated, and how much it costs when you do. Isolated margin fences off the margin you assigned to one position. The liquidation price is computed from that margin alone, so it sits relatively close — but if price hits it, the most you can lose is that fenced-off margin. The rest of your account never moves. Cross margin throws your entire available balance behind the position as backup collateral. That pushes the liquidation price much further away, so the position is far harder to liquidate on a wick — but the bill, if it ever liquidates, can be your whole account, not the slice you thought you were risking.
Cross is "safer" per-trade and more dangerous account-wide
This is the trap. Click into cross and the liquidation price leaps comfortingly far from your entry — it feels safer, and trade-by-trade it is. But you didn't remove the risk, you redistributed it: every dollar in your account is now standing behind that one position. A single violent move can take everything instead of one position's margin. Isolated does the opposite — a tighter liquidation, but a hard cap on the damage. For directional leverage on a single coin, that cap is usually what you want. Cross earns its place on hedged books where positions offset each other, or when you've consciously chosen to let spare balance defend a high-conviction trade from a wick — and you know exactly how much that defense can cost.
The number to read is "most you can lose"
Don't anchor on the liquidation price — anchor on the right-hand column. Under isolated, the most you can lose is the position margin. Under cross, it's whatever balance the position can pull in before the exchange closes it, which on a fast move can be far more than you intended to risk on one idea. If that figure is bigger than you'd accept losing on a single trade, you're in the wrong mode. Pair this with the liquidation calculator for the full price picture, the position size calculator to cap the loss before you enter, and the safe leverage calculator to keep the liquidation out of normal volatility's reach.
How to use it
1. Pick long or short and enter your entry price, leverage and the margin you'd assign to the position.
2. Enter your total account balance — this is what cross margin can draw on.
3. Adjust maintenance margin to your exchange's tier (often 0.4–1% at moderate leverage), then compare: cross moves the liquidation further out, but the "most you can lose" column shows what that distance really costs.
FAQ
How is the cross liquidation price found? Cross treats your whole balance as available margin, so the position can absorb a loss roughly equal to the entire balance (minus maintenance) before liquidating — the model spreads your full balance behind the position rather than just its assigned margin. Real exchanges add tiered maintenance and fees, so use this as a close estimate, not the exact engine value.
Does higher leverage change which mode is riskier? Higher leverage tightens both liquidation prices, but the account-wide danger of cross grows fastest — the more leverage, the more a single cross position can swallow your balance on a small move. High leverage plus cross is the classic account-wipe combination.
Which should a beginner use? Isolated. It enforces the discipline of deciding, before you enter, the exact maximum you can lose on a trade — and it makes that loss impossible to exceed. Graduate to cross only once you understand hedging and can state your account-wide risk out loud.