Rule #4 is right and wrong, it's depends on you. the reason the experts say stay out is, too much risk, it moves so fast, sometimes you can't get out of a bad trade if there is no stoploss set. But likewise a half hour before and after things start moving in the way they may go for the day, giving you a head start if your brave, try on a demo account and see for yourself.
I usually watch the news and see the pips rise and fall like yo-yos, try it, you'll see!
Best of trading, safe trader. you'll last longer, but won't make all the dough.