Is there a huge difference between 5 and 10 STT?

[ksuno1stunner]

This is my graph so far. I started out with -3% ROI for $2 playing 4 tables at once, and then moved up and had a 26% ROI for $5 playing 2 tables at once. I then move up to $10 and have a huge drop, playing 2 tables at once. The thing is, with a different username about 2 months ago, I had a decent ROI at $2 4-tabling, then moved up to $5 and faced a similar drop.

Here's my current graph:



I started playing $5 around game 50, and the huge drop is when I moved up to $10. I know I could be facing a cold streak, but man...didn't think it would be this bad. I did suffer some dirty beats though...