There are hundreds of those.
I don’t think that’s really what you’re asking for: I think you’re asking for one that fits that description [I]and is profitable[/I].
If you had one, would you sell the signals?
The answer is “selection bias”, but I’ll explain why …
It’s relatively easy (given plenty of knowledge, understanding, judgment and due diligence!) to identify a signal service that has had a good few months of profit, but (and here’s the point) [I][B]it won’t be the same one that’s still making profits in a couple of months’ time[/B][/I], and there are reasons for that, which aren’t trivially easy for the uninitiated to understand.
There are thousands of signal services “out there” (and unfortunately quite a few of them “in here” as well!), and at any one time, out of those thousands, it follows that there will be a small number who happen, simply by the laws of chance, to have had a run of a few good months.
There’s also a process at work which statisticians call “selection bias”, which predicates that [I][U]those few are usually the ones you see advertising and promoting and being recommended most prominently[/U][/I].
Unfortunately, the fact that they happen just to have a few good months has very little (or “[B]no[/B]”) bearing at all on their chances of having a good few months [B][U]again[/U][/B] when you subscribe, because they had it by luck and “[I]because someone has to[/I]”, not by skill. They’re successful [B]marketers[/B], not successful traders.
That’s the “hidden reason” why it’s so very, very common to join a [U]successful[/U] service and for it all to turn sour as soon as you start paying for it.