When am I ready to move up to 2/4?

[Faluzure]

I'd definitely stick to 1/2, and if you haven't already, I'd get pokertracker. If you're only beating the 1/2 games for 1BB/100 I'd definitely be worried about trying to move up. 1/2 games are generally looser and less tricky than 2/4 games. I've been beating the party 1/2 games 6 tabling at 8.58BB/100 and don't move up simply because my overall winrate is much higher than at 2/4.