About this app

Runs a full grid of fast and slow moving-average pairs over the training portion, draws the result as a heat map, picks the best cell and applies exactly those parameters to the untouched remainder — reporting both figures against buy and hold. The heat map carries the real lesson: a best cell that is an island surrounded by poor ones is an accident of one particular history, while a parameter worth trusting sits in the middle of a broad region that all works.