Chart in Anaplan Dashboard
Conditional formatting in the UX uses a line item number reference to determine what colour to use.
Therefore, create a new line item in your target module and using IF THEN ELSE create a condition in which a +1 is returned when WFC > 6 and a -1 is returned when WFC < 1.
I would also caution as to what happens when WCA = 1.
Therefore, use a statements similar to the following;
= IF WCA > 6 THEN 1 ELSE IF WCA < 6 THEN -1 ELSE 0
Zero is return if neither conditions are met.
In the UX when setting up the dot chart use this line item to inform the conditional formatting.