It's an algorithm. There are several incarnations of Thought Field Therapy. The only one I know to be valuable is I believe Thought Field Therapy. Google it. I was in the middle of a major depressive episode. And my psychologist turned me onto tapping. I did it for two days and all the intrusive thoughts went away. I started sleeping at night again. I've never seen anything so powerful in my lifetime. I still have a paper around here on it but I haven't had to use it since. We also use tapping and the exercises preparing to do Qi gong exercises in a group and we use it to harvest our energy when we are finishing an exercise session. I will try to find my information and tell you which version I encountered. My psychologist told me that there are many many imitators because the person who came up with this patented it and that as far as he knew the imitators did not work like the original. It will seem weird to you when they tell you to roll your eyes in the hum but believe me this stuff works. It works for depression and other psychotropic situations, and it supposedly works for pain although I haven't tried it for that I should. I hope to get more information to you soon.