Visual Optimal is a free tool developed by Little Fat Cow that allows users to visualize the robustness of trading strategies by generating 3D surface charts of parameter optimizations. The user guide instructs users to optimize their trading strategy in Tradestation, save the output as a .txt file, then use Visual Optimal to read the file and generate interactive surface charts with color-coded fitness metrics like net profit, profit factor, and return on account for up to 3 parameters. Examples of good and bad surface charts are provided.