I have looked at this. Indeed I waded through a 2 inch thick book on the subject, which I found very dry.
However, I think that aspects of NLP may be used in trading. My main memories of my reading is the emphasis on how you react to the world with your senses and how you have preferred senses for interpreting the world.
For example you might evaluate a project as:
Visual: Yep, looks good to me.
Auditory: I been hearing good things about it.
Kinesthetic: I feel good about the whole project.
Olfactory: Smells like a winner to me.
Gustatory: I can taste the victory.
This is taken from the site http://www.nlpinfo.com/ There is a lot of information about NLP on the net.
Personally however it seems to me (does the use of seem suggest visual is my preferred sense I wonder as I write this) - it seems to me that its value is limited in trading, because 2 of the senses visual first and auditory might prevail.
I would certainly be interested in hearing other peoples' evaluation of it. Is there much more to it than my summary above. If so, how can it help trading ?
Charlton