Comparing a field from one table with a field from another table. ie IF(X=Y,"true","false")

I think I've gone as far as I can. The issue on the interface level is that the calculated column does not show up as available for either other calculated columns or measures. I tried calculating a numeric day of the week instead of a string and that didn't help. I don't think I can go farther over email. If you want to invest the time to do a screen share we could have a conversation, but I can't promise any results. At this point I would fall back and try loading a simpler table that had only some identifying fields and the day of the week. Create a relationship to it and see if the day of the week field shows up in the intellisense. If it does, then gradually expand the "simple" version out to be the full table you want to load, checking as you go to see where it "dissappears". Thanks for the responses, it's been interesting.