I know you can apply conditional formatting to a field in report builder: http://technet.microsoft.com/en-us/library/dd220466%28v=sql.100%29.aspx
The example on the page above gives this example setting a expression in the property box Color:
=IIF(Fields!Profit.Value < 0, "Red", "Black")
That is a good example if you know the name of the field. However I would like to apply conditional formatting within a field that is derived and I am not sure what the name of the field is.
For example in my SSRS report I have a matrix with two text boxes that supply two numbers. I then put a calculation into the third text box which references the first two:
Within Report Builder my calculation just appears as expr or expression. How do I reference the calculated text box within the IF statement for conditional formatting?
I have tried using things like calculated fields instead of a text box but the problem is that the Matrix wants to sum the percentage and so a calculated text box works better than a calculated field.