A couple weeks ago I started playing 1$ SnGs on a popular online poker room(poker site?). I've now played 90 of theses SnGs and I am up 12$. That's not bad considering it took me 15-20 tournaments to adapt to the SnGs format during which time I lost about 10$. So I'm up 22$ in about 70 tournament.
I know there is a thing call variance and I might be just running lucky, but I do feel I play much better than 3 weeks ago. There is a lot of error that I was making (too much bluffing for example) that I no longer make or that I at least can now recognize and work on.
What I'd like to know is how can I know if I'm a profitable player at this game/stake? How many tournament do I have to play and how much do I need to be relatively confident I'm profitable or at least in the good direction?