I often had this question when I was a beginner. Every trader has his understanding of how much time to spend on trading. It is all very individual. For the most effective trading, I use the period from 9 am to 6 pm. It may seem like a long time interval to many people, but I pause between trades quite often. Sometimes you need to relax and give your body some rest. If you ignore the pauses and work 6-7 hours in a row, your efficiency will likely drop, and you will make stupid mistakes, thus losing your investment. During breaks, I suggest you listen to calm music or meditate. It will calm your nerves, and you will be more restrained in further trading.