one of my clues for hypomania my T sees has to do with my speech (faster) and the subject matter, if I am irritated in general but especially with my husband and talking about that a lot and especially if I am talking a lot with my hands. (how many times did I hit the potted plant with my right hand) Those are behavioral clues, but she's seen me for 6 years so she knows what to look for. Otherwise yes it is possible to be baseline for a long time. I fluctuate but usually in small degrees that are caught. If there's a med change I see my T every 2 weeks and pdoc in 4. Otherwise I go every 3 weeks to T. and 2 months to pdoc and I've been ok since June. I"m watching myself right now because Sept/Oct always seems to be a bad time for me.