One of the best practices of dashboard building is to avoid overwhelming your customers with too much data at one time - especially in a chart, where they can lose sight of the primary message if focusing on inconsequential data. One of the common ways dashboard designers help focus the message of a chart is to limit the data labels to only the key points.
For example, I can make this chart easier to digest by removing all but the first and last data labels.
Once I have only two data labels, my eyes immediately take in the message of this chart (that we went from 11 to 53).
» Read more: Automatically Label First and Last Chart Points