Graph Opus facilitates an analyst reducing a dramatic work to a sequence of weighted events; GO uses the running total to create a graph, the peak of the graph is the climax of the play, lesser peaks are anticlimaxes.

Graph Opus Event List Screenshot

Negative weight. The event reduces the tension of the dramatic work, the protagonist experiences a negative event; music slows, softens.

Positive weight. The event heightens the tension, is positive for the protagonist; music is played faster, creshendos.

Graph Opus Macbeth Climax Graph Screenshot

From this, Graph Opus identifies the climax event.