A trend is a good idea in most investments.

But to invest in foreign exchange you also have to be very well infomed and commit to that task. Shorting the Euro immediately the Greek debt issue got out was also a good idea, but now it's fallen so far i'd buy it long now for a mid term gain, whereas i'd short the peso, now an instinctive social spender has been elected at a time of rapidly rising government debt and a fatuous policy that no new taxes are needed if we collect the ones we are already owed.