I've seen it another time, last week on EUR/JPY 250 pips in 1minute (30th October) - so I don't really think I catched the first extreme move like that... Even if you're trading that long and didn't have problems with that; the point I want to make is, that the plan is not under controlled risk in theory. And as seen last week those big moves are damn possible. Say you had a 20 pip SL on the EUR/JPY (which is VERY WIDE on that scale & price environment at that time) you would have lost 25% of your equity with a 2% risk rule. Sure only 10% on 1% per trade and maybe even less when you have only part of your entire bankroll on that account (although you i think you can't really manage to have not more than 10-20% of your bankroll on your account, due to deposit/withdrawel fees or simply the extra amount of effort...). So, it's up to 20% of your ENTIRE account or more if you SL has been less - which is likely (how long do you need to recover that?). It's an impeding doom.
btw: Would you mind telling me why you force yourself 8+ hours in front of the monitor? I mean either trading has to be increadibly exciting to you or you do it for the extra amount of trade possibility you get on the smaller timeframe (then again, why don't you trade longer term, including exotics or cfd's - if you're a technical trader you'll get the same amount of signals without having to battle against the enormous spread, and being stressed all day long). It's 8+ more hours spare time - seems to be a fairer deal to me