The essence of trading is a game of probabilities. Even textbook-level entry signals can end in failure, and perfect execution cannot prevent a series of losses. That’s why experienced traders never overly focus on the gains or losses of individual trades — what truly determines your final profit is how your trading strategy performs over a sufficiently long period. In other words, risk management and mental discipline are the keys to long-term survival. Master probability theory, and the rest is up to time.