Thanks, strategesis that does help. 

However I am still a little confused about the inverse relationship. Is stop-limit only meant for stop-loss trades where I want to limit losses when price drops? Can it also be used if I want to execute an ask/sell above say .00006 and then only fill above .00007 (on the assumption that someone will be buying higher)?

I little drowsy now, think I may have to return to this in the afternoon...thanks again!