What biorhythms are
Three sine waves from the birth date: Physical (23 days), Emotional (28), Intellectual (33). Value = sin(2Ο Β· days Γ· length). COREBETS adds Rosetta quadrants, optional secondary cycles, and a Bio Index (Physical 50% / Emotional 25% / Intellectual 25% with +8 ascending / β8 descending).
Critical days and astral hell
Critical β zero crossing. Peak |value| > 0.95. Valley |value| < β0.95. Astral hell is a soft birthday-drag window. Soft flag only.
How COREBETS uses them
Stack of 100: Numerology 25 Β· Four Pillars 20 Β· Mars fight 15 Β· Bio 15 Β· 6th dominance 15 Β· Western 5 Β· Vedic 5. Bio stays a 15% amplifier. Mars fight and 6th-house dominance (~30% combined) print on Board / Desk matchups, not on this calculator. Preview, then confirm. Never silent auto-trade.
Evidence caveat
Hines (1998) reviewed ~134 studies; biorhythm theory failed replication. Bio stays β€15% and has to earn keep in the calibration log.
Privacy
Birth data stays in this browser. Do not publish private natal data.