About this app

Five charts, drawn identically, each either a real 120-day stretch of a real company or a series generated on the spot. The fakes are matched to a real window on drift, volatility and even fat tails, so a single violent day proves nothing. What they cannot fake is volatility clustering, and that is the only honest way to tell. Most people score between two and three out of five. Same five charts for everyone each day, with a shareable result.