Now the offer is 20 15 yuan for 489 lots to queue up.
20 14 yuan bought 769 lots and stood in line.
If you want to close the deal immediately, you must buy it on 20 15. If you don't want to pay 15, you can only hang 14, or lower, and go to the queue. If you hang up 14, you have to wait behind 769, and it's your turn to wait until they make a deal.
So when you want to close your position immediately, you can only buy it at 15, and then you have to close your position immediately and sell it at 14. If you don't lose money at this time, if you want to close your position at 15, you have to queue up behind the 489 lot.