A stop is an intrinsic part of a trade. Without it, risk-for-reward cannot be evaluated. With it, and with the risk/reward judgment that it produces in conjunction with entry and profit target, factors such as trade memory and trade culling -- the latter critical and dependent on the former, b/c in my experience, it's the trades you don't make that determine overall success -- remain in play.
Risk/reward allows a trader to profit with a .500 or lower trade batting average. A stop? Never leave home without it, I say.