Everywhere you look in the trading blogs and videos you see it big as day-"psychology is everything". Experienced traders agree. When you first start trading you think your strategy is your winning lottery ticket. As time goes by and you understand what trading really is you start to change your focus from indicators and software to your own thoughts and actions. Eventually you come to the conclusion that it's not what the market does that is important-it's what you think and what you do. The refinement of your trading is parallel with the change in your trading mindset.
Experience is a great teacher if you let it be. Developing your own trading rules and trade journaling helps elevate your trading skill. Rules and records give you structural feedback so you can improve yourself.
The decisions you make directly affect your bottom line. They need to be rational and consistent as part of your trading plan. In order to get the results you want you need to change what you are doing. If you don't change what you are doing your results won't change.