Recently, someone asked me about this again, so I might as well share my understanding today.

To be honest, many people confuse cross margin and isolated margin. The core difference lies in the risk diversification logic. In cross margin mode, all available funds in your account can be used as collateral, which greatly reduces the risk of liquidation. It's especially suitable for hedging or arbitrage strategies. As long as the leverage isn't too extreme, the likelihood of forced liquidation is generally low.

On the other hand, isolated margin works differently. In this mode, the margin for each position is allocated independently and does not affect others. The advantage is that losses are limited to that position’s margin. The downside is that if the market moves sharply and leverage is high, that position can be easily liquidated. But the key point is, even if it gets liquidated, only that position’s margin is lost, and your entire account remains unaffected.

From a margin perspective, cross margin (also called cross collateral) shares a common margin pool across all positions, supported by the entire account balance. Isolated margin means each position is managed independently, with its own margin account supporting it separately.

Ultimately, cross margin leverage is more suitable for institutions or experienced traders using it as a hedging tool. Isolated margin, on the other hand, is more friendly to beginners because your potential losses are controllable and won’t wipe out your entire account due to a single mistake. That’s also why many exchanges recommend beginners to start with isolated margin.