look at my stats and tell me how to improve NLCASH

[Blind Alley]

I've been reading 2p2 for well over 2 years now. I think I have read every post on Heads-Up in the last 6 months. Now it is finally time to make my first post.

I the beginning of the month I thought I should give HU a shot, beginning from nl50 as I prefer cash-games over sit and goes.
Since 6.9 I have been playing HUnl50 exclusively.

Now it is time to move up to nl100 and I would like to have some comments on my stats and how I should improve.
I know I'm a nit, and I will really focus on loosening my game up from here on.
For the first ~30K hands I was usually playing 3-4 tables simultanely, but for the last ~12K hands I have played max 2 (occasionally 3) tables, and as you can see from the graph, my winrate has increased dramatically.