What does the check box for restrict trades mean?

I thought it would lower the trades if I checked it but it was not much different than leaving it checked. What does it actually do?
https://www.draftdaysports.com/board/
https://www.draftdaysports.com/board/viewtopic.php?f=329&t=34105
bagman428 wrote:I thought it would lower the trades if I checked it but it was not much different than leaving it checked. What does it actually do?