1, what you understand is quite right. The prices you see on the software are all the prices of other people's pending orders. If the price is not reached, there is no deal.

2. For example, if you sell 5005/ buy 5000, there are four price points in the middle, namely 500 1, 5002, 5003 and 5004. At this time, someone wants to buy 5002, and someone just sells 5002. You will see that the K-line chart will rise to the position of 5002, because the display is always delayed, but the price of 5002 can't be traded for a few tenths of a second.