I'd like the ability to write a custom formula in my indicators.  Example:  

If: COLUMN_1 > (TARGET_COLUMN * 0.75) + 20, then change color.

To accomplish this currently, I have to create an additional variable and set it equal to (TARGET COLUMN * 0.75) + 20, then create my indicator as "If: COLUMN_1 > VARIABLE_1, then change color"

This would save time and reduce clutter when creating this type of indicator.