I've found 1-2-3 formations particularly helpful; they're the only "reversal trades" I ever take - all the rest of my trading is with-the-trend (and of course it's possible to trade 1-2-3 reversals only "with-the-longer-trend" for increased reliability, albeit at the cost of a reduced trading frequency).
With care and experience, and careful money management, and patience and discipline, it's not terribly difficult to achieve a 70-75% win rate with these trades, using a 1:1 R:R and setting the stop loss just beyond the 2-point.
I don't really accept, in principle, that "strategies work": I always think that "traders work" (or not), but given the care and experience, and careful money management, and patience and discipline, this is certainly a pretty good and reliable strategy, I must agree. It's based on something real.
Please excuse my mentioning that that AdmiralMarkets "explanation" of them, above, really sucks, IMO. I'm not saying it's "all wrong" ... it's just confused and confusing and
very badly written, IMO.
For anyone interested,
this link downloads a 24-page PDF on the same subject, by Mark Crisp (not breaching the author's copyright, here: the link is to a download from the "Trading Naked" site, which the author has allowed to share the PDF ... and it does advertise one of his own websites ... but it's also a clear, good, well-explained account of 1-2-3 formations).