Contract: 1. Only hold one coin in the same direction, not two coins. If you have ETH, don't do BTC. For example, you can only hold one coin when you are long.

2. But if you are long or short, you can place orders or hold positions at the same time. There is no conflict between holding one long and one short position.

Spot: Don't worry about it, but you must do the strategy. You can't just buy one coin. If you only want to buy one coin, you can't do it with a full position. You must leave room to go further. #翻仓