So, you need absolutely nothing to experience a winning trade. Not even an edge.
However, to experience a constantly rising equity curve, you may have an edge while keeping in mind that this alone won't assure you of consistency.
What you need most is to think in terms of probability. There is a random distribution wins and loses for what you want will define as edge. The losses are just the cost of business that allow you to be available for the winning trades.
Managing self sabotage and euphoria is important because such beliefs will negate the full potential of your edge and probabilistic mindset. Your edge and probability are your friends. Self sabotage, euphoria and fear are your enemies. Every one of these come from within. They don't emanate from the market.
We use the edge to avoid risk. But there isn't a single edge out there in the world that can remove the risk of any trade. The best your edge can do is tell you what might happen. It cannot tell you what will happen and remove the risk.