Chart - Conditional Formatting in DS 1.2

I'm trying to differentiate color for columns in the chart when values are less than zero.

I have set BW Bex Query Exceptions, but they are not transferring to the Charts in Design Studio applications - DS 1.2.

Also, conditional formatting options are not available for Charts in DS 1.2.

Are there any options to address this?

Due to some limitations, we are not prepared to upgrade to DS 1.3 at this moment.

Thanks much for your help