i too am a rapid cycler it would seem...i was just diagnoes a typical bpd and he has me mood charting for 2 months to go back and get a more clear diagnosis I see myself being diagnosed with a mixed form/rapid cycling as my mood changes multiple times a day and sometimes I feel up and down all at once...I started having a hard time charting but just started putting both a high and a low on a given date because i dont know what else to tell him...let him interpret it!