The point on the graph of the relationship between the result and the volume shows the absolute result, where the X axis charts the traded volume by day. It is assumed that if you have a large enough set of statistical data, clusters of points can be generated to show the optimum, effective, and convenient trading volume per day.

This chart is most useful for American markets, since all shares come in an equal lot of 100 shares.

For other markets, it makes sense to use this chart only for filtering by one