When using <Labels - Show in Labels - Individual Values> for the visualization, Spotfire will start displaying value for every X value starting from the left, therefore all labels will cover the data line and each other. Clearly that is not useable.
An easy fix:
1. Users set the maximum number of labels (already exists).
2. Spotfire displays the set number of labels with an equal interval across the entire range of X values. The first and last X should always be displayed. (filter settings should apply to this function)