Because a novice trader only wants profit in a very short time and can't contain his emotions when he has made a little profit and speculates that the price will reverse direction, can't hold floating for a long time, it's better to close and then open a new position again, want to increase profit and still don't know good money management yet but that's normal because they are new to it and haven't found their trading style as time goes on they will find their own way of trading