I've noticed that most traders who have posted on this site follow sectors religiously and base a lot of their trades on what those sectors are doing. For example, stock ABC may be mentioned as a "sector leader", a.k.a. a "Tier 1" stock in its sector, and when the entire sector is up a trader may decide to then go long on ABC. Other traders (i.e. Hitman) mention trading only or mostly Tier 2 (sector laggers) stocks, again based on what the sector as a whole is doing. How do I know what stock is a sector leader (Tier 1) and which is a sector follower/lagger (Tier 2)? Don't these change with some frequency? Finally, is there a site one can go to at which one can enter a stock symbol and then see an overlay of that stock's performance in comparison to its sector? I tried on Yahoo Finance where its chart has a box for "Compare to ....." but I try typing in various sector symbols and get an error message - I think I can only enter company symbols and not sector symbols. Thanks in advance and have a great weekend!