These high-control contracts really start calculating fees within an hour. I advise everyone not to get involved easily. You might make ten rounds of profit, but as soon as you're caught once, all the profits from those ten rounds will be wiped out. High fees are simply unbearable in front of the market makers. At this point, the market makers will either sideways grind or look at the distribution of long and short positions—if longs increase, they will dump; if shorts increase, they will push up. The result is that you don't dare to hold heavy positions in this range because of frequent bloodsucking, and the fees will directly eat up all your gains.