Has anyone noticed that at times if all last four are improving e.g. 8532 quite a few winners would result, but I don't have any statistics. Feel I should follow Sportznut's suggestion and offer a stray thought.

Been there , done that. It does get some good priced winners , but sometimes there"s only 1 or 2 bets, not enough for me. I was using their last four starts and three starts from a spell [ no last start winners].