After a direct sharp drop on heavy volume, when you encounter this kind of heavy volume move, shorts can take profit directly without hesitation, then wait for a new opportunity again. Watch whether 2440 holds as support and forms a fuel-added long setup. When the 15-minute two-way favorable golden cross is confirmed, then enter long according to 136. Do not jump the gun; if 2440 does not hold as support, you need to skip one signal before you can enter long!