02. Random Walk

Concept you'll learn: How random steps accumulate over time, what a "path" looks like, the dW (Wiener process) term in the formulas.

Start with price = 100. Each tick, flip a coin: heads → price += 1, tails → price -= 1. Plot it on a TradingView Lightweight chart as a line series. Add a button to regenerate. Run multiple paths simultaneously (overlay 5-10 walks on the same chart).

This is your first time seeing that Z ~ N(0,1) term in action — each step is a random draw, and the path is what you get when you accumulate them.

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