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I have a list of time intervals along with their convenience ratings. I wish to highlight intervals rated anything other than impossible which conflict with those rated impossible. I use start1 and end1 named ranges to refer to the interval endpoints and convenience is self-explanatory.

I couldn't do it with ISBETWEEN, but the following formula appears to correctly return true for all such intervals and false for others:

=OR(ARRAYFORMULA(
  IF($C1<>"impossible", 
     IF(GTE($A1,FILTER(start1,convenience="impossible")),
        IF(LTE($A1,FILTER(finish1,convenience="impossible")),TRUE)
     )
  )))

However, when I enter this in Conditional Formatting it is rejected as invalid formula.

How can I add it to the conditional formatting rule?

Here's the spreadsheet. The data in question is the sheet named "TEST" (the last one). The formula has been entered in column P.

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  • Hi and welcome. You say I wish to highlight intervals rated anything other than impossible which conflict with those rated impossible Would you please edit your spreadsheet (and include a snapshot in your question) to provide an example of how the conditional formatting would appear if you had a successful outcome. Perhaps it is just me, but I'm confused about the specific columns/rows to which you want to apply conditional formatting.
    – Tedinoz
    Sep 5 at 2:31
-1

It was very simple. I had just forgotten that in conditional formatting, references to named ranges must be made using the INDIRECT function.

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