Brownian Motion
Also called: wiener process
The random, jittery path used to model how prices wander through time — borrowed from the physics of particles in a fluid. It's the raw randomness that Black–Scholes and most modern pricing is built on top of.
Where this is taught
Definitions are the trailer. These free levels turn Brownian Motion into something you play — one bite-size lesson, with worked examples, a quiz and XP.