i think a good account balance will survive "1" news hit, but not twice. As seen on 03/18/2009 *.chf rises, because CHF drops dangerous. My demos recovers in one week, but the second news hit on 25/03/2009 (fed news) not really good (over 80% floating)
the problem is, if you take a look at the economic calendar (like forexfactory), on which news will your account drop?
what i have seen is, all high impacts where between GMT 13:00 till 21:00 an not before 13:00, so trading the asian session only will be much safer then 24/5 trading - with less profit but more secure