If you have a version of WSW that includes the AutoWatch feature, you can set specific sites to be monitored as frequently as once a minute. That might have some impact on your system if you have a lot of bookmarks that you want to check that frequently, but the point is that how quickly WSW picks up changes depends on how you set up AutoWatch. Unfortunately, beginning with version 5, WSW no longer included AutoWatch in its least expensive version, a real loss.