Abstract: A biorhythm cycle indicator includes a housing having a plurality of substantially sinusoidal shaped windows shaped to define the extremes of a given cycle with an indicator continuously visible within each window indicating the deviation from the norm within the cycle. The indicators comprise markings on the face of a pair of meshed gears driven at a rate defining the cycle with the markings on the face thereof visible within the window. A clock motor is provided for continuously driving the plurality of indicators, each at a rate defined by its cycle. Adjusting knobs and shafts are provided for adjusting the cycle to that of an individual's biorhythm cycle.