Derived from M.A. Vukcevic's solar-activity formula linking heliocentric Jupiter–Saturn sidereal orbits to model the sunspot cycle, the concept applied below utilizes a proprietary harmonic to project S&P 500 market swings.
Exhibiting no consistent polarity or directional bias, the blue Jupiter–Saturn curve features inflections within a 3-to-12-day window; consequently, any swing duration exceeding seven days is bisected to optimize short-term S&P 500 correlation.