Many people struggle with whether to choose cross margin or isolated margin when trading contracts. In fact, each mode has its own characteristics. Today, let's break down these two modes in detail.
First, it's important to understand the concept of margin. The margin required to open a position is called the initial margin, and the minimum margin to maintain the position is called the maintenance margin. These two concepts are very important.
How does the cross margin mode work? Simply put, all available funds in your contract account can be used as collateral for the current position. If the position incurs a loss, the system will automatically add margin from the available account balance to reach the initial margin level. The advantage of this is that your loss-absorbing capacity is stronger, making it less likely to be liquidated during small fluctuations. But the risk is also obvious—if a major market move occurs, the entire account could be wiped out in cross margin mode.
Isolated margin is different. The margin for each position is independent, and the system will not automatically add margin—you have to do it manually. This means that if a single position is liquidated, only that position's margin is lost, and other funds are unaffected. However, the trade-off is that you need to manage your positions more carefully, strictly controlling the distance between the liquidation price and the mark price; otherwise, a loss in a single position can catch you off guard.
Here's an example to make it clearer. Suppose you and a friend each have $2,000, and both use 10x leverage to go long on BTC. You choose isolated margin, and your friend chooses cross margin.
If BTC drops to the liquidation price, you will lose $1,000 and be liquidated, leaving you with $1,000. Your friend’s position, after losing $1,000, will have margin automatically added, so the position remains open. If BTC then rebounds, your friend might turn a profit; but if it continues to fall, your friend could lose the entire $2,000.
So, the main advantage of cross margin mode is its strong risk resistance—it's less likely to be liquidated during volatile markets, and it's relatively simple to operate. But in the face of major market moves, the disadvantage is deadly—it could wipe out the entire account.
Isolated margin requires you to actively manage risk, manually add margin, and precisely control the distance to liquidation.
Currently, most platforms default to cross margin mode, and both modes support leverage adjustments up to 100x. However, there's a detail to note—when you have open orders, you cannot switch between cross and isolated margin modes, nor can you change leverage.
Regarding how to calculate position margin, there's a formula: Position Margin = Position Value / Leverage + Additional Margin - Reduced Margin + Unrealized Profit and Loss.
Calculating liquidation risk is also crucial. For isolated margin, liquidation risk = Maintenance Margin / Position Margin × 100%. For cross margin, liquidation risk = Maintenance Margin / (Available Balance + Position Margin) × 100%. When the risk reaches 70%, the platform will issue a warning; exceeding 100% will trigger liquidation directly.
In simple terms, cross margin is suitable for traders with sufficient funds who want stronger risk resistance but should be prepared for the possibility of losing the entire account in a big move. Isolated margin is better for traders with lower risk appetite who want more precise management, but it requires more active operation. The choice depends on your trading style and risk tolerance.
