You can't "hide" only certain sets from your trade list. But one way to do it would be to create a separate collection, load them all in there as having them in your collection, then once done, move them all into your For Trade lists.
I personally have a collection that is only for cards for trade; this keeps my other collections without any "green" in them and easier to sort through.
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0