It is better to have a personal trading strategy, as it will give us a greater chance of success. I always trade using personal trading strategy, it helps us to make right decisions while trading. And it increases the success of trading. For the past few years I have been trading using trading strategies, and I have managed to own a good amount of money. In my opinion everyone should have a personal trading strategy. This will help us to earn good amount of money from trading.
Absolutely, because in trading you are your own boss. Which also means you are the only person accountable for your own actions. If you don't set rules, systems, and strategies in play. You will not have any guide to where you are going or what you want to achieve trading. You are the only person who can restrict yourself. It's your own approval and your own actions. That's also how you build the discipline required in profitable trading.