I have touched on this under Mixed State, although it has slightly different components. One definition of rapid cycling is four or more depressed or manic episodes per year. I think to a lesser degree I can rapid cycle on a weekly basis (sometimes even daily). According to www.aboutbi-polar.com the term ‘’ultra-rapid cycling’’ may be applied to those who cycle through episodes within a month or less. If this pattern occurs within a 24-hour period, the person’s diagnosis could possibly be termed ‘’ultra-ultra-rapid cycling’’ or ‘’ultradian’’. It is often hard to distinguish from a mixed state. I have big changes in my mood, stability and creativity over short time frames. I am just beginning to learn about Ultradian syndrome and guide you towards an interesting article on http://www.psycheducation.org/depression/Waves.htm