Many of the books I have read have some advice about when to move to the next level. While some of this advice varies, most of them say you should be winning at the level you are currently playing. While bankroll should be a consideration, many of these poker pros/authors say you can take the risk to move up – if you want to and can afford it.
Moving up to the next level does not mean you will make double what you were making at the current level as the players at the next level for the most part are better and tougher.
For myself, I will basically wait and see if I can run well in July and if I end the month in the black. I may try a shot at the next level and if I run badly, go back down a level until my play improves.
What determines the level you play at? Have you ever moved up a level and decided to go back to a more comfortable and profitable level of play?