This is a handbook on the DeMark indicators. The book is useful if you subscribe to the indicators on Bloomberg, etc. You won't find these indicators on Esignal, Tradestation or on free websites.
So does this book contain anything useful for the rest of us? Yes, if you want to program the indicators yourself in whatever system you are using. Just don't expect total clarity because the author is not going to give away the straight formulas for proprietary indicators. However, with some creativity and the information in the book, I'm sure they can be reconstructed. Anyway, the book is much clearer than DeMark's own books.
And for the rest of us that are not programmers? No. This book is not for us.
However, I would assume these indicators will be available for all systems in a couple of years. Until the I give the book only two stars.
I have written several short reviews on trading books. The best way is to compare the score on the books I've read. Many reviews on amazon.com are just glorious 5 star reviews. I use all five categories; sorry but everything isn't "great". Books rated 5 are very good. Books rated 4 are good solid books well worth reading. Books rated 3 can be bought by some people who read a lot or have very specific needs. Books rated 1 or 2 I would not recommend buying or reading. Naturally all in my humble opinion.