First of all, K-line theory is very useful at critical times, especially in western markets, because investors in western markets are more mature.

Talk about the deficiency of K-line according to my own experience;

1, the main force is easy to cheat with the typical K-line form.

2, the price operation is not "continuous", so there are moving average indicators.

3. It cannot reflect the intraday trading intensity of key points.

4.k-line analysis is generally used for short-term analysis or key points, which is not helpful for long-term prediction.

5.k-line analysis, including any other technical analysis tools, is probability, not absolute.

I hope I can help you.