in the player statistics, there is a SD/100 in BB and 70% and 95% confidence, but those don't work, they give an error that abs_bb_won_per_hand is missing.
Is that error "normal"? Is that what you mean when you say it's not been added yet?
Where exactly are you finding this stat? What is the correct stat name? What version are you using? Build 2? I wonder if this is one of the stats that was added by mistake and removed again for beta 12.
BTW, if you remove the report you also have to remove the custom stats it creates separately.
SD won't give you an indication of running bad as such. If you are in the middle of a downswing, and want to know this you would be better off taking a look at PokerEV. It will give you a rough guide to how you have been running in terms of EV and has a some basic stuff on "luck".