In recent months, stock index futures have changed dramatically, and it is very normal and frequent to fluctuate from dozens to hundreds of points in one minute. If you set a five-point stop loss, it may trigger as long as you open the position for minutes. Of course, this is the case when you set an automatic stop loss. If you are flat, I'm afraid you may not be able to stop those five points in time. After all, the fluctuation is very huge now. How many points to set depends on your tolerance and timely stop loss. Sometimes it's not even a straight draw. Even if you stop at five points automatically, it is enough for you to get 20 points in an instant. Stop loss, how many points, how flat, and at what price. This is what you need to consider in combination with yourself.