Not entirely sure I’m making sense of your post.
But yes: been at it more than ten years I guess i.e. since 2005 (with a break of about two or three years so that probably doesn’t count).
And yes: I have encountered a system which has produced positive returns for me. I trade it every day and have been doing so for the past five years. Given that it was part time though I simply withdrew profits as and when they were on the table and blew the money i.e. there was no goal of building up the account because a) at the time it had a lot of money in it and b) I was making money elsewhere. And the only time the said system has let me down: wasn’t any fault of the trading system but me getting too clever on a particular trade last year on Gold i.e. cannot blame the system because I was ignoring its signals. Still closed the year up in spite of a mammoth loss on that particular trade.
My personal findings above aside: the said system has been independently tested by various people (and I’m talking about professionals here not some dude sitting with MT4 and trying to back test and curve fit the results). It’s robust over YEARS of testing. That’s all there is to it. I don’t know what else to say to you.
If you think I’m talking nonsense: by all means. I have an entire thread in which every single thing about it is detailed. You don’t have to take my word for it. Take the thing, implement my improvements relative to risk based position sizing and fixed (mental) hard stops, and run it on your own charts.
But I will say this: it took me many years to get to this point. And cost me more than anybody here can even imagine. But if I look at what I do now and have been doing for the past five years: it’s sinful that I wasn’t able to get it right years ago and without having to lose the farm. And that’s why I’m saying on this thread: people make this too complicated. And I CERTAINLY was one of those very same people when I started out and for many many years unfortunately.
But I need to add this too:
Your statement was a blanket statement saying that “trading systems that work do not exist”. Other than very expensive algos. and HFT: do I think it (trading) could be 100% automated??? No I don’t. I do exercise SOME judgment now and then that’s true. But certainly nothing along the lines of trying to understand nonsense that I don’t have enough years left in my life to grasp e.g. fundamentals and economics and the usual suspects. The actual mechanics of the trading system itself don’t require much thought though I can tell you that.
All of the above being said though I could very well end up with egg on my face because somebody (not me i.e. just somebody following what I do).is working on this (an EA for it) right now and testing and apparently the results are pretty good. Maybe not as spectacular as my manually trading it. But an overall profit is an overall profit. Certainly will be one up on 95% of the other stuff around here that’s for sure.
And one last thing to add (which maybe does back up your argument): algos. and HFT is not trading as we know it. It’s really nothing more than the manipulation of order pricing.