It's all market price, but the slippage for BTC should be okay. The main issue is the high transaction fees. The recent returns have indeed been poor, and I'm considering shutting down this project.

James was liquidated this morning. In the morning, he held 7727 BTC, with a liquidation price of 107617. At 9:14 AM, BTC started to crash, reaching James's liquidation price at 9:23:43. James was liquidated for 1500 BTC, and then the BTC price immediately rebounded, clearly targeting James.
My copy trading strategy didn't distinguish whether James closed his position voluntarily or was liquidated, resulting in more losses.
By the way, it seems that after liquidation in Hyper, users are left with a relatively large amount of margin, not all of it is confiscated. #james