Is there any psychologist who can help traders to train their sub-conscious minds and make decision-making more sharp and efficient?
You do not need a psychologist for that. All you need is to strengthen your willpower, learn to recognize when your emotions are high and never trade when feeling emotional. That is really 99% of what you need for any trading strategy.
Some people would call that 'having a high self-discipline'.
People call being reasonable with yourself and your funds many names, but it does the same thing in fact - keeps you save and makes your time on the market and during the trading sessions that much more enjoyable and rewarding.