TD Ameritrade Holding Corp. - 2002  (Inactive Symbol)

The following graph plots the year-to-date performance of the stock for 2002 compared to the probability calculated by a random walk model.

Initial Value*: $3.9 Hist. Volatility: 4.8% Annual Drift: 7% Final Value*: $3.8 Percentile: 61%
Click on the image for the high resolution version.

The high to date and low to date prices of the stock plotted against a random walk model for 2002 (what's this?).