I'm always interested to meet people who think that the fundamental strength/weakness of a company/sector/index is meaningless.
I've heard a few arguments supporting these claims that were well thought out, but none of them have really had a very solid foundation because the arguments were always taken out of context.
My view.... Fundamentals are the most important FIRST step. IOW, which industries are likely to gain an advantage under the given circumstances. And on the flip side, which are likely to be disadvantaged by certain factors. For example, our current economic situation (rising rates) is beneficial to health care and consumer staples. If I'm looking to make a bullish trade on an equity, I am going to favor those sectors. On the other hand high rates really hurt the tech sectors such as chips and box makers, thus if I want to make a bearish trade I will gravitate toward them.
Once I have narrowed my search in this manner I can move on to TA to provide a slightly better than random entry into my positions.
Most arguements against fundamentals that I've heard don't acknowledge the fact that fundamentals are not a short term indicator. They are indicative of likely strength in comparison to the broader market over a longer time frame. A strong company in a strong sector isn't necessarily going to go up today. It might not go up at all, but it will likely not drop as much/quickly as a weak one in a weak sector.
Whenever I neglect fundamentals completely I usually find myself in trouble. Case in point: my last few AAPL trades.
. I do not care what works or what does not work in general, only what works for me and you should only care about what works for you.