Enable absolute value comparison for the field. For example, "-20" matches with "20". This rule works only with numerical fields.
Consider this example:
The data shows transactions between Liquid Dealers Ltd and Solid Trading Ltd. Data set 1 represent trades from the point view of Solid Trading Ltd., whereas Data set 1 represent trades from the point view of Liquid Dealers Ltd. Data set 2 indicates the Amount value as negative for when Liquid Dealers Ltd is selling shares and as positive when it is buying shares. The amount is always positive in Data set 1.
The compare absolute value rule instructs Duco to compare absolute values (i.e. values with their "+" or "-" sign removed).