When I was 12 I wanted to become an astrophysician. At 16 I wanted to become a neurobiologist. Then at 20 I thought that scientific research can be boredom if you don't find anything if you are not really a genious . So I just decided to become an engineer. Nevertheless from time to time I still follow some researchs. So I will post here, and others can do it also, some facts about the brain that can be useful to know for trading. For example there exists a "psychologic refraction period" that is necessary to treat any elementary token of information. It is at least a few hundreds of millisecond. And our brain is like Windows : it is a false multitask processor but only monoprocessor. So all informations are treated sequentially and take an important time to process. That's why in daytrading, above all at sub level scales, one can be stressed if not prepared enough because too much information to treat at high speed.