I just organized some notes about margin trading and want to share the differences between full margin and isolated margin modes, because many beginners are still a bit confused about this.

The full margin mode basically means your entire contract account assets are used as a large margin pool, with all positions sharing this margin. What's the benefit? Your floating losses are buffered by the entire account assets, making it less likely to be forcibly liquidated. For example, if you have 100 USDT in margin funds and open several full margin positions, if one loses, the margin from other positions can help support you, greatly reducing the risk of liquidation. But the downside is, once you are actually liquidated, you might lose the entire margin amount and all full margin positions.

Isolated margin is different. You need to allocate a fixed margin for each position separately, and this margin can only be used to maintain that one position. If the margin for this position drops below the maintenance level, you will be liquidated unless you add margin in time. This mode seems riskier because the floating loss tolerance is very small. Taking Ethereum at the 3000 level as an example, using 100x leverage on full margin only requires a 30-point price fluctuation to reach 100% margin utilization, but isolated margin only needs a 15-point move to reach the same level. So, isolated margin is indeed a high-reward, high-risk approach; you could be liquidated with a small misstep.

Regarding how to allocate margin, my suggestion depends on your trading cycle. For ultra-short-term trading, I usually use about 10% of my account funds to open positions with 100x leverage, so Ethereum would need to move 300 points to be liquidated, which controls the risk pretty well. Remember to set take profit and stop loss, that’s essential. For medium to long-term positions, allocating about 3-6% of your funds is more reasonable, and you can relax the take profit and stop loss levels a bit.

Another point many people overlook is the pairing of leverage multiples and margin amounts. For example, if you have 10,000 USDT, choosing to use 1,000 USDT with 100x leverage and 4,000 USDT with 25x leverage, the profit and loss potential are actually the same. But what’s the key difference? In the first case, you still have 9,000 USDT available for maneuvering—adding positions, adjusting, or hedging risks. In the second case, you only have 6,000 USDT of flexible funds. So, although low leverage with high margin might seem conservative, it actually gives you more operational space and risk resistance.

Overall, full margin is suitable for experienced traders who can better manage multiple positions. Isolated margin is better for those who want to isolate risk and focus on specific positions. No matter which you choose, the key is to allocate funds reasonably, set proper stop losses, and avoid greed.