This is the help page for Auto Swaps.

When Does It Run?
Auto Swaps run on days you have selected in the auto Swaps area in your Profile.
If you have no days selected it will not run.
To Open your profile, Login, click on My Home, then My Profile, scrol down to Auto Swaps area, change settings and click "Save". 

Which Swap documents does it run on?
The code runs on swap documents that are not Deleted.
Runs on swap documents that have been modified in the last 30 days.

Which member types?
Auto Swaps runs on all members, but only full members can contact swappers.