当然有用，当趋势改变时，及时退出可以避免损失。

来源: hppyny 于 2023-09-16 20:44:54 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.