Pat and Pat,
Watch the spread and volatility guys.
You''ll find that way of trading needs space to breathe too, so if you use a high spread pair, you're stabbing yourself in the leg before you get going.
I prefer to trade pairs that trend smoother, like usdcad or eurgbp, but their spreads are killer. I use the same method but open up the pips, according to my crims' spread. i still get caught out by whipsaws, but the ea takes the positions again, and if it does'nt well then the trend has changed.
I dont want to suggest a size as this is really something you must practice yourselves and it greatly depends on the crim. Not all spreads are equal crim to crim.
I'm also considering opening my general BE settings from 20/10 to more like 30'ish for the same reason. Whipsaws.
hope this info helps,
cuzgeorge