I am trying to get a handle on the TRIN measure. I understand its calculation, but on occasion it seems to operate in a manner contrary to logic. Today is an example where the Dow gapped up and continued to trade up but the TRIN moved up as well for the first half hour. Another example was last Friday where the Dow gapped down and continued down for an hour while the TRIN also went down. Has this to do with large short covering in todays example or short entries as in Friday's example? Or is there another explanation?