I thought Mark wrote a fairly good book. I think he had some original concepts that he applied to trading and he was the first to do it. He took dynamic psychology and applied it to the trading mind frame - a connection of ideas that no had ever published before him (as far as I know). My problem is: he makes it seem like the trading mind frame that he describes is the holy grail. He often talks about how easy it is to find a positive expectancy system and what stops people from becoming successful is not their inability to find a system (because those are plentiful according to him) but their inability to develop the correct state of mind. I'm thinking Douglas never was a profitable trader. Does anyone know if he was? Are positive expectancy systems easy to find. In my time involved with trading I would say positive expectancy systems are not easy to find... What are others views?