1, know the margin ratio first,1800/2200 = 0.81818 ... it's about 8% margin.

Settlement deposit 2085 *10 * 0.08 * 250 = 417000 initial deposit 1800*250=450000.

2. Floating loss (2200-2085)*250=28750, deposit 1668*250=4 17000, handling fee 30 * 250 = 7500 * * 453250.

There are still 46,750 funds available, and no additional margin is needed. Of course, if the margin ratio is not 8%, it will be calculated separately. Hmm. How interesting