0.8*5%=0.04
0.8*(100%-5%)=0.76
(0.8-0.76)*25,000*2=2,000
2,000/(2,500*2)*100%=40%
0.04*2口*25000=2000
原始保證金也要*2口=5000
2000/5000=0.4=40%
5.COMEX的銅期貨原始保證金為$2,500,交易人以$0.80/鎊的價位賣出..-阿摩線上測驗