I don't get it. WTF could I possibly doing so wrong?

[Bigwig]

It's not a down streak. It's not bad beats. It's a statistical problem. The following numbers are close. Not exact. But close.

Last ~5000 $20/$30 tournaments, ROI ~= 24%

Last ~3000 $50 tournaments, ROI ~=6%

And those last 2000 on the $50s have been brutal.

Now, can this big a range be variance?

Or, what could I possibly be doing between the levels that is resulting in this big of a drop off? I really don't want to make my living playing $30s.