[waveslider]

I find Andrews method most helpful when the market is "swinging" rather than in a strong trend. I don't trade forex ( I do trade currency futures), but from what I've seen, the pairs trend pretty strongly. You might be better off using trendlines and channels.

The other point you mentioned about going off on a tangent is applicable to any method, and if you are suseptible to distraction (like me), this is where developing your discipline comes in.

Successful traders often use only one or 2 methods, and may wait around for days or more for that method to flash an opportunity.

Andrews is a worthy method, it is a good illustration of market symmetry.
GOOD luck!