I was invited to participate in off-exchange investment. At first, I deposited 1000 USD with 1:1 expert support. Every day, I follow the expert's orders. There are some profitable orders and some losing orders. I think it's normal to have profits and losses in investment. So when I saw a large losing order, I asked the expert to cut the loss, but they refused and asked me to deposit more to hold the position. After 4 deposits, the amount I deposited increased to 9000 USD. When I proactively cut one losing order, the expert called and demanded that I not cut it. When I asked, they always replied that it was fine. But when my order reached a loss of 71,000 USD, they asked me to deposit an additional 20,000 USD to maintain the account. At this point, I feel like I have been trapped and cannot control my account. The volume I requested was small, but when I didn't trade the full volume, the expert would call and urge me to trade the full volume. On 33+31/7, despite having a large profit, the actual status of the orders was still negative, so there was no money in the account for me to withdraw. I hope all investors are cautious.