I'm curious (honestly), what approach do you use for your trading?
While I wait for the millions of eager TA adherents to send me their hundred bucks and teach me to make billions? The most reliable secret method of all. I hesitate to share it here in public, so lean close and I'll whisper it...
(Dice, my friend. I have a pair that came to me from the Roman times, and had been - I have an authentication scroll somewhere around here - touched by Nero himself... they
whisper to me. Sometimes even when I'm miles away from them.
Amazingly precise in Forex - but only when trading the Roman
denarius against the Persian
siglos. The volume's been pretty low for some reason...)
A bit more seriously: I'm a short-volatility guy who is trying to lean a bit more into his quant background (once I have the time to clean up my rusty and long-neglected core skills.) For now, I do the wheel plus some ICs and things like that, but I'm always long the market (while keeping my ear to the ground to the best degree I can.) I'm also carefully exploring a bunch of other things including futures, but options are my first love.

I keep a journal here, where I detail my wrestling with them.
I do have quite a bit of TA in my background - that is, in fact, how I came into investing in the first place. The guy that taught me the basics is an ex-hedge fund CMT plus a whole bunch of other related abbreviations. 30+ years of experience. So I understand the TA perspective perfectly well, and know the arguments for and against it. That's
why I don't believe in it.
I'll caveat it to this extent, though: I think some aspects of it can be useful as an
influence in trading (although I don't know to what degree.) Things like extreme highs and lows, standard deviation boundaries, and catching current trends can be of use. Market/volume profile, which, to my mind, doesn't fit the TA mindset - it's based on distribution analysis a lot more than on graphical interpretation - seems to offer a fair amount of benefit. I'm planning on putting a bunch of time into investigating the latter.
But the basic "support and resistance" story? Maybe it used to work in Charles Dow's day, when the market was much smaller and there weren't all these smart, well-heeled arbitrageurs around. But if it ever did, it's deader than the dodo now.
P.S.: I agree that things are not all as simple as suggested before. Support and resistance make sense, to me, insofar as you consider them as areas that can be used as a reference point for (mainly) major market players. However, I hardly think they'll necessarily coincide with tops and bottoms, but rather with consolidation areas (zones with very high accumulated horizontal volume), simply because that is more likely to indicate an accumulation or distribution area. That being the case, it'd arguably make for an area that'll be "defended" by big market agents. That is simply my take on it, though (I approach markets from a Wyckoffian perspective) and I have no hard, long-term statistical data to back this up hahaha
P.P.S.: I obviously backtested my system (about a year worth of data, manually, from the same market) and it worked/is working well enough for me; however, I recognize that has nothing to do with long term applicability and it's not in the least confirmative of S/R/Other-standard-concepts-of-TA.
To my mind, discretionary trading always has an element of art to it - and it is almost never visible to the "artist". It's never "just" S/R (or whatever); there's all this market knowledge/experience/personal history/risk aversion/screen size/lunch quality/girlfriend interaction/etc. STUFF wrapped up in every one of those trades. If the sum total of THAT is positive enough... then I believe you could throw dice and trade well. If your system works well for you, then -
please - don't ever let anyone dissuade you from using it.
(Interesting as it would be to do comparisons, traders make money by sticking to what works and not scattering their energies. Let's see, where did I put those knucklebones again?...)