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.
With no consistent polarity or directional bias, the blue Jupiter–Saturn curve inflects within a 1-to-12-day window; thus, swings exceeding seven days are bisected (blue squares) to optimize short-term S&P 500 correlation. Previous examples [HERE].