Memory size

The cycle of the body changes with the years. It becomes longer or shorter. On one hand it is reasonable to use many cycles as a basis for cycle analysis; on the other hand it is not advisable to attach too much importance to old data. PERIMON takes the last 15 cycles into account for its calculations with different weighting.

So whether you choose “Remember the last 52 cycles” or “Remember all cycles” doesn't matter and is up to you.