Why this exists
The idea is deliberately simple: remove the company, date, headlines, and hindsight. Leave only the shape of the market. Pick long, short, or no trade, then reveal the next 40 trading days and the effect on a fictional $10,000 account.
As the original launch note on X put it, the project grew from a personal question about whether price direction could be predicted just by looking at a chart. Turning the experiment into a game made the question much more enjoyable.
A brief history
LongShortGame launches on the web. The public LongShortGame account joined X in December.
A native X/Twitter version lets players reply long or short to chart rounds. It eventually takes a “surprise” break after running out of rounds while the web game stays alive.
The game is still capable of surprising its own maker—and publicly documenting that fact.
The original application and market archive are revived on modern Rails, with guest play, saved accounts, and proper high scores.
The honest disclaimer
Pattern recognition is compelling. Markets are less cooperative. LongShortGame is an experiment in decision-making, not evidence that a chart can predict the future—and certainly not investment advice.
Ready to test your eye?