How to use field parameter for both positive values and negative values

[PrashanthG]

I'm using a field parameter which using in a slicer. The slicer is using to filter the visuals and also highlight the values from a column conditionally. When the column value is greater than or eqaul to slicer value (5) it should be hightlighted. It is working fine for positive value. I need to highlight negative values also. Please find the below screen shot for reference.

 In the above screenshot -6.05 flag value should highlighted(CHECK).