Psychology is 90% of trading success ,unless trader is a robot.The human with a mind is going to execute the trades.The brain command center makes all the trading decisions.
The evidence is there on the free internet , there are simple free profitable methods ,systems and techniques , yet 95% fail and dissapear.
If traders don't understand the mind ,how it works subconsciously in trading , the traders can not have any plans for the 90% risk of under performance due to psychology.It is with the mind where traders lose in trading due to emotions ,stress , need to be right , subconscious emotional executions ,mind traps , automatic mind in trading , beliefs in trading , subconscious errors , brain command centre shutdown during trading , brain freezing in trade executions ,the power the thought , negative wiring of human brain and it's performance in trading ,meditation , unreality reading of the real market conditions,cognitive biases in trading decisions , mental traps , benefits of patience and disadvantages of impatient traders , impulsive , self sabotage in trading executions , stress responses , amygdala hijackings ,personality , ego and other psyche characteristics.There are effects of cortisol hormone testosterone traders trading risk.The mental preparations are required for daily trading.
Those traders who say psychology is unimportant are just useless clueless traders.