Technical analysis is just an auxiliary tool. For example, if you want to measure the length of an object, you can simply use a ruler to measure it; you don't need to know the evolutionary process of this object from non-existence to existence, nor do you need to know why a ruler is called a ruler, why this length represents one millimeter and this length represents one centimeter, why other lengths do not represent one millimeter or one centimeter, why length is called length, what material this ruler is made of, how this material is made using what tools, as well as the broader mechanical principles behind making this ruler, and how this machinery is made. This would completely miss the point. Your goal from beginning to end is singular: how long is the object you need to measure?

If you are using the MACD indicator+, you only need to know what type of indicator MACD is, what market it applies to, how to use it, and then use it as needed; going deeper is just a waste of time. What you really need to spend some time on is reviewing the charts based on usage and finding the method that meets your expectations. The same process applies to using other technical tools. I also spent a long time going in circles in technical analysis, repeatedly suffering losses, and only when I started to seriously sort out how to achieve profitability did I realize that every tool is pretty similar; the difference lies in the different analytical perspectives of using the tools, which leads to different applicable market conditions. Technical analysis is just a basic tool, a trivial part of the factors that contribute to profitability. Treating technical analysis as the entirety of profitability and delving deeper into research is a mistake.