I am making a filtered list of trade proposals in this google sheet. I would like to remove those that have been put online in the last 5-10 minutes and only show older ones. I would like to avoid advertising a trade that has been arranged during a private arrangement.
The sheet now pulls a table from a website with IMPORTHTML every 5 minutes. With a FILTER function on a different sheet i remove all those trades that are not of interest.
How would i be able to check weather the contents of the cells imported by the IMPORTHTML have stayed the same during the update?





