I'll take a brother who placed a trade with me as an example. He entered a short position at 2129. Although his leverage is 200, in reality, using full position leverage for calculation, his actual leverage is double leverage at 100% of the funds held.

That is, according to the rules, the liquidation price should be above 3000.

For breakeven loss, you need to offset your opening position by 30 points to achieve breakeven. For example, if you short at 2129, the breakeven loss is 2120 (actually 9 points). If you set the breakeven loss very close to your opening position, it’s easy to get liquidated on the spot.
You can choose later; currently, the price has already fallen below 2100. If you're worried about a sudden surge and can't withstand it, closing at 2098 with a small fee won't result in a loss.