If a person has 10000 yuan,

The first-hand sugar price is 5000 yuan, the first-hand sugar price 10 ton, and the 5% deposit is 2500 yuan. If futures fall by 10%, that is, to 5000-5000* 10%=4500, the actual loss is 5000 * 10% *.

If this person only has 5000 yuan, and he made sugar at that time, assuming that the margin has not changed before it falls to 4500, then when it falls to 5%, that is, when it falls to 5000-5000 * 5% = 4750, the futures company will call this person and ask for additional margin or liquidation. If this person is unfair, then force it to level off; If there is a continuous daily limit and the position cannot be closed, then the customer owes money to the futures company.

Please point out what you don't understand, and I will continue to answer for you, hehe. I hope I can help you.