Use of data value labels
Bar charts should not need data value labels. If you need data value labels, create a chart−table combination.
Example of a chart−table combination
If you cannot create a chart−table combination, make sure the data value labels are placed at the base of each bar and right-aligned.
Example of how to format data value labels in a bar chart
Things to avoid
Avoid putting the values at the end of each bar, as this makes it difficult for users to follow and compare the values.