The tree window buttons include a button marked Graph () which produces a graphical display of the relative performance of each move from the current position. All moves that have been played at least 1% of the time, and at least 5 times, are displayed. Percentage scores are always from White's perspective even when it is Black to move. The graphs can be saved in PostScript format via the file menu.
In the tree graph, a red line is plotted showing the mean over all games from the current position, and the area between 50 and 55% (where most standard openings are expected to score) is colored blue to assist comparison of moves. Note that white usually scores around 55% in master level chess.