Rising with favorable news, you buy...
Falling with unfavorable news, you sell...
Although it cannot be said that buying and selling based solely on this will definitely result in losses, after all, sometimes there will be continuity in rising and falling, and trends need to be identified. However, over a long period, operating purely based on this high-frequency (non-trend operation), what is known as high-frequency trading at peak levels, it is almost impossible to make a profit.