A trader should be a smart one or has a knowledge on basic trading or better if advance trading. All traders should posses this one. Plus, there are two which i consider the core on having good decisions. Its patience and controlling of emotions. With this three you can trade wirh greater and consistent profit.
Well, those are two very important points between patience and emotional control in market turmoil, often people who are emotional at seeing market movements by thinking it will be very profitable quickly and after the market is in a downtrend they take to withdraw all their money and get losses, analysis is also very important because to be able to determine market movements going forward, but I have never been convinced that what everyone recommends is a consistent profit, all cannot be considered easy.