By creating a process and setting trading rules for yourself, you can achieve consistency in your execution.
Rules are there to help turn positive trading behaviour, or what works for you, into acquired habits. By having rules, you can train yourself over time to recognise and have automatic responses to the trading strategies that you recognised.
Having a set of rules, helps you make good trading decisions in the face of uncertainty. With time, deliberate practice, and experience, these rules will lead to a natural feel for the market, great trading habits, and consistent profitability. Human emotion is unpredictable and that the future is unforeseeable; there are no certainties in market behaviour and this makes "trading a game of probabilities"!
A typical "Sniper tutorial session on trading HTF-SkyLand". Only "one strategy"!