I didn't find it useful at all for any time frame of trading. The only upside is that it has a lot of interesting charts - and hey, I love those charts - the downside is that the patterns often have very little to do with the author's analysis, and the majority are not significant enough to be profitable. At all. You're better off using the plain vanilla indicators. Much better off.
I guess the book was written for the metastock guru who wants to program all of them into metastock and would have fun doing so.