For stacked bar chart it's better not to use more than 3 segments per bar. Otherwise that chart becomes cluttered and it's extensively harder to read chart and compare separate segments.
In stacked bar chart it might not be easy to compare segments that are part of different bars. If you want to compare segments you might need to use diverging or grouped bar chart. Fortunately in Datylon bar chart it can be done in one click.
Comparing stacked bar charts that include segments with negative values can be misleading, as it may distort the overall interpretation of the chart. If your data contains negative values in one or more segments, consider using a grouped bar chart instead. This approach provides a clearer and more accurate representation of your data in such cases.
100% stacked bar chart allows you to compare the structure of several categories. But it's important to remember that if the range of values differs between categories there might be a misleading sense that values are similar. The recommendation is to use 100% stacked bar chart only for the cases when the total values of different categories have the same range.