My favorite pair is GBP / CHF. I like this couple because of its volatility. I am still trying to understand it and I studied it in a demo account so I can know how it moves and how to get maximum benefit from partner trading. Although I have never traded in GBP / CHF so I do not know about it and I never monitor it but because you say it is very easy to change, then I will try to trade in demo account first and see the same results.