Duan Yongping said that those who look at K-line trading are fools, as that is for long-term, low-frequency trading. When we talk about trading, we are referring to relatively high-frequency trading; otherwise, we are not discussing the same thing. In my personal experience, K-line accuracy is higher for time frames of 4 hours or more, as they are less affected by noise and interference. The smaller the time frame, the stronger the randomness and the weaker the regularity, being more influenced by various external information, news, and large institutions. In any case, I still believe that for retail investors, K-lines are among the most valuable tools. Of course, there are many paths in trading, and it doesn't necessarily mean there is only one effective way. But if you insist on saying which is better or worse, I can only chuckle.