What if I Close Every Losing Trade on a Friday?

"It's just been a remarkable thing for me to have the confidence that it doesn't matter if my next trades are going to be a winner," Peter says. "I'm a glorified order enterer. My job is to enter orders that make sense relative to the way that i look at marcus", he adds. 'If i do that and cut my losses, then i shouldn't be worried about what happens at the end of a week, or a month, whatever'