>>>It just occured to me though, that was back before decimilization. Probably these days if the market is leaning in one direction, it's not that hard to get stocks to move at least a penny, where as you use to have to get them to move a 16th.<<<
I don't see the difference. An uptick is an uptick - a down tick, a down tick. Your conclusion would also imply that volume would have inceased but actually it's now lower.
I have been watching the tick real-time for about 5 years now. Much has changed since 9-11 and the following intervention attempts.
Joe