Hi Philip, these “calculated measures” are offering just some basic ratios between two measures that you already have in your insight, but you can unlock the full potential of GoodData by
defining your metrics in the MAQL language using the metric editor.
This
language offers you a lot of functions including
ABS for absolute value.
In MAQL you can not reference the “calculated measures” defined visually, but you should be able to create any metric from them in MAQL as well (or we can help you here). If you already have the % difference in your data, this metric in MAQL would be something like
SELECT ABS( perc_change_value )
or if the perc_change_value is not a metric already but just a column (fact) in your table, you would need to add some aggregation to it as well, for example:
SELECT ABS( MAX(perc_change_value) )
BTW the quickest way how to get to a metric editor is to click the “Create metric” in the bottom left corner of the Analytical Designer.