I have also mentioned that ETF data is not very useful, and more than once. Recently, someone asked me again and I repeated it. I remember discussing this matter with Teacher P, and the conclusion we reached at that time was to show those in need that everyone has their own investment system, and the most important thing is to be suitable for themselves. To be extreme, just like its honey and its arsenic. If someone says good about any indicator, there will always be someone who says bad about it. It is not a problem to simply clarify their own opinions.