Regarding opening positions, some people still don't understand what leverage really is and how to use leverage reasonably.

There are several types of contract units:
1. Quantity
2. USDT - Value
3. USDT - Cost
4. Quantity (lots) (this can be ignored)

The first type is what Dogge uses. This means I directly open a certain number of Ethereum. For example, if I open 1 ETH, and ETH is priced at 2000, then with 50x leverage, my margin cost is $40. With 100x leverage, my margin cost is $20. With 200x leverage, my margin cost is $10.

In full-coverage mode, the number of leverage multiples doesn't matter. If I open a long position of 1 ETH, then a 50-point drop in ETH results in a $50 loss; a 50-point rise results in a $50 profit. It's very easy to calculate.

Now, the second type is USDT - value. This represents how large a position you need to open. For example, if you want to open a long position worth $10,000 in ETH, then a 1% increase in ETH means a $100 profit; a 1% decrease means a $100 loss. The leverage multiple here doesn't matter much; it's just about how much margin you need. With 100x leverage, your margin cost is $100; with 50x leverage, your margin cost is $200.

The third type is USDT - cost. This represents the margin you plan to allocate. Essentially, the leverage multiple indicates how large a position you can open. Just multiply upward. This calculation method is actually very difficult and easy to misunderstand. It's better to primarily use the first two methods.

Additionally, how large you can open depends on your maximum single-loss tolerance.
If you have $5,000 and your maximum single-loss is $500, then it's easy to calculate:
- 5 ETH with a 100-point stop-loss
- 10 ETH with a 50-point stop-loss
- 20 ETH with a 25-point stop-loss

Just do the math yourself and work backward from the stop-loss level.