At this position, an empty position can enter a long position. Surely someone will ask, Teacher Chiye, does this mean that if you have a position, you can roll over to go long?
My answer is that there are certain risks. Others entering a long position are those who were empty and want to avoid missing out; they can add to their position again, which allows for greater flexibility in risk management. Rolling over instead increases risk; if you are willing to take it, then go ahead and roll over. I need to sleep now, headache $BTC