A black platform maliciously adjusted the margin ratio, causing the account to be liquidated and blown up once. The loss was huge, and the platform refused to handle it. Definitely a black platform. Within half an hour after the market opened on Monday, the margin ratio had to be greater than 200%. Normally, if it's less than 200%, it should be liquidated, but the system did not liquidate your position, treating it as an actual stop loss. The market gapped down at Monday's opening, causing me huge losses. They apply double standards when dealing with clients.