Safer? In this case, it is referencing numbers only.

But can you explain further, and give me a couple of examples of such error values, logical values and arrays?

I don't think I will get in that deep, but what might be an expected outcome?

I'll give the =TYPE()=1 a try.

=((TYPE(H4)<>2)*(H4<>""))*OR(H4<$E4,H4>$G4)

How would apply your suggestion to this formula?

Thanks,
Gary