DislikedCorrelation of EURUSD/USDCHF is actually called EURCHF. It would be flat or ranging all the time if the two first mentioned currencies would be correlated.Ignored
And correlation means close to 1 or reverse correlation is close to -1 HISTORICALLY.
Not where the trader feels like picking data from. If you use this and are successful good for you. But it is not by definition what you call it.