this idea / system is good, i can attest to it, but, it has flaws that will require adequate familiarity with the general market scenario and the template one is using.
for example,last week i was up 220 pips by thursday, with a system like this - just this, and this pairs - and by friday i lost 250 pips!
now tell me, was it money management or something?
i applied the same management principles i had used to make the 220pips.
i have analysed my trading and i tell you, this method can be good but watch out for its backside.