ROI question

[livinitup0]

What is the smallest # of tournaments you can play to determine an accurate ROI? Is 300 the smallest, or if you feel your play is consistant can you get an idea with around 100-150
I just started tracking mt sit and go play the other day part time. 7 games and an ROI of 107.8% (I know it wont last) P.S. I prefer PL Holdem SnG tourneys, any PL fans out there?

[ThorGoT]

Check out posts by Irieguy. I believe at one point he said 1,000. 300 tournaments is enough to get an idea if you are a winning player.