There are a number of reasons Younger Traders lose, not a well backtested method, lack of faith in your backtested method, no idea how markets react, and boredom. I know in my own experiences, boredom has created much more losses than I care to admit. It is tough to sit here in front of screens and wait for entry signals. Last Friday, I had one signal, was a small profitable trade, and that's it. I had to sit on my hands and just wait. But I do recall in my youth, I would do "extra" trades that were not part of my methods. Those were the days trading the markets were exciting, not profitable, but very exciting. Now the days are not exciting but much more profitable, it is a job like almost anything else. You confine to your rules and just patiently wait. Play another game of solitaire.