Stop Excel from updating formula after a criteria is matched

Question

Is there a way to stop a formula from updating after a certain criteria is matched?

For example:

A1 = 1
B1 = \'=A1*2\'

Lets say thi

Answer 1

There is no simple way to do this. I simply added two timestamp cells containing the @NOW() function, formatted to display time. The other contains the @Today to show date. I then copy paste special to the correct cell keeping values and source formatting.