when to move from 100nl to 200nl

[Igloo9]

My first 20k hands playing 100nl I broke even. My last 18k hands I've shown much improvement with a win rate of 5 BB/100. I'm playing 19/15/3 at 100nl pretty much playing standard poker - wait for hands, dont get too fancy. My question is when do I move up? Is 18 k hands with 5 BB win rate good enough to say "ok I'm a winning player at 100nl, should be a winning player at 200nl". And at 200nl do I just stick with the same style or do I need to mix it up more - any comments greatly appreciated.