Not having a trading plan is a fatal mistake. If we don't have a trading plan, it means that we will tend to trade based on approaches that can be said to be messy plus disheveled. How can we expect success from random methods? Conversely, having a trading system means we have guidelines and goals and how to achieve clear objectives in trading. Having a trading system increases the likelihood of success, because we have guidelines for entering, leaving the market or standing aside. In other words, we are on a certain path to achieving our goals