i find that looking at the order book (at least in the YM) is almost useless (for me) or even worse for determining anything.
simply put, there is way too much fake size, gamesmanship, and algos showing size to have any utility
i DO pay a huge amount of attention to PRINTS vs. orders that are in the book. those are very useful imo, but i have yet to see any utility (in YM) at looking at the # of orders in the book), except to sneak in limit orders at price levels with small size (getting in ahead of others), but as far as helping predict movement - no utility (for me).
i *have* found that reading the order book in the Nikkei (specifically the SGXNK contract) is VERY useful. for some reason, it seems to work much better there.
nothing against broz. i have watched a few of his webinars and he seems to be a good trader with a solid methodology.