A few things I've built.
Charts how the gradient of a simple moving average shifts across multiple securities over time, built on daily aggregate market data.
Splits each trading day into its overnight and intraday components and compounds them separately, showing which of the two actually drives the move.
Detrends log closing prices, extracts the dominant angular frequencies, and refits them as a Fourier series to reconstruct the underlying cyclical patterns.
Interactive CLI simulation of Conway's Game of Life, with a configurable board, frame rate, preset patterns and seeded random starts.