You have confidence about your investment so you will not face any loss because those always face loss who have doubt about their investment. You are using DCA methodology so you can invest whenever you have money and the price is down and here the risk is also very minimum.
I disagree, even if someone is confident with what he's doing. That doesn't exempt him from facing any loss.
What he can be confident about is on how he's going to face the serious matters that he'd encounter with his investments. The advantage that he's getting is that he's confident and prepared.
But if it's about guaranteeing himself to have zero losses, I doubt it that even the best investors are still facing some losses but the big difference is that they can face it without anything to worry with.