Is K-line analysis really useless?
Don't make it a myth. K-line analysis is just a tool. Some people can use knives to cut vegetables for state banquets, and some people can cut their little fingers.
How to make good use of tools is something that a craftsman needs to keep polishing, and the same is true for technical analysis.
In addition, the market itself is changeable, and controlling the "three rates" law of trading is the core, and tools are only auxiliary.