1. Why cancel the spot order will return failure?
Answer: Because when the cancellation is requested, this order may have been successfully matched.
2. How are the highest, lowest and volume calculated?
Answer: The highest price, the lowest price and the turnover are calculated according to the dimension of the last 24 hours. The 24 hour opening price takes its value from the opening price of the K line at the last minute of the 24 hour period. That is, at 11:23:45 on July 23, 2019, the rise and fall depends on the opening price at 11:23:00 on July 22, 2019.