When you already hold a position in your hand, opening a position in the opposite direction after closing the position is called. Backhand position. On the basis of the original position, change the direction of opening the position and keep the position unchanged. For example; Originally holding more than 10 lots, driven by the sense of disk, he changed direction and shorted more than 10 lots. There is another big advantage of backhand opening. In the case of "roller coaster" market, you can stop immediately and win.