This is my 100NL graph... decent win rate didn't eliminate 20BI swings.
I recommend a very conservative stop loss and or a reasonably small stop-loss before moving down. Those are much bigger swings than I ever hand @ 50NL. I think it's due to more and smarter aggression at the tables, and in turn you will have to up your raising / cbetting and have to widen your ranges if you want to try and play optimally.
I wouldn't feel comfortable with less than 5k online to play 100NL - which is why I dropped down to 50NL again for a while after cashing out because of account hijacking paranoia and downswing, rather than redepositing.

fwiw I had a bigger $/h @10NL than I did at 50NL due to playing more tables, ueber-fish and heaterments. But if I hadn't moved up and stayed up I would have never improved to beat 100NL where I am winning more than I did @ 10NL ldo.
$/h really isn't everything.