Needle pattern refers to the price fluctuation of any currency. At a certain price, it rises and falls rapidly. K-line diagram shows a long upper shadow line. Or rebound after a quick breakthrough? K-line diagram shows a long shadow line. Due to the leverage effect of margin trading, when the price fluctuates greatly in a short period of time, whether it is the upper shadow line or the lower shadow line, the point reached is likely to lead to a large loss in the account. The deposit is not enough to maintain? Original contract? Is the overall equity negative? Explosion situation. Can you pay attention to the perpetual contract of 58 coins? There is no manual pin fixed-point blasting.