Most of the useful concepts I’ve discovered for use in trading are things that I’ve learned on my own - like brokerage collusion, stationarity in cyclic ranges, double-agent entries, the superior nature of reversal-trading (letting the market make the first move), hidden markov model signal pattern recognizers, probability space divisions, fractal space, the superiority of equidistant bands for finding reliable support & resistance levels, the uselessness of most traditional TA, the usefulness of Hull and smoothed MAs, the all importance of re-entries over exits and entries, the Nitefort principle (properly reading a currency strength meter or dashboard indicator over multiple TF), econometric data (the market is a pattern destroying mechanism but it can’t help but rhyme) and a few others I’ve probably ‘compressed’ in muscle memory but don’t bring to mind very often anymore. Of course most of these ideas originated as the kernel of someone else’s idea, so I’m indebted to many traders and authors who have written about their opinions, yes, some of them even came from BP and FF, but generally speaking time is better spent reading books than forums.
So to answer the question what is missing on the internet about FX trading - almost 99.5% I would guess? Then again, the internet is a big place and I haven’t been able to visit all of it, though if you looked at my bookmarks you’d think I’d tried.
There isn’t much incentive for knowledgeable, experienced traders to wrestle with the ignorance and rudeness of inexperienced traders in order to offer their good advice, and almost all FX ‘trainers’ and ‘coaches’ are charlatans who either don’t trade, trade poorly or trade seldom and make most of their income from selling fluff. So the occasional trader who does give away info that is useful (people like Laurent Brunet) should be followed and analyzed with a fine tooth comb, every droplet of golden wisdom collected with care and then tirelessly examined to see if it can uncover new insights.
However in the end, when you compare the complexity and difficulty of doing something like becoming a dentist or a chess champion, trading is simple and ‘easy’ in comparison. I disagree that psychology is the deciding factor, it’s knowledge but the people who hold it guard it carefully like alchemists of yore because, well, it’s valuable, and if it becomes common knowledge it loses its value - that’s the nature of a market - smoothing out the price imbalances caused by imbalances of knowledge.