Backtesting is a crucial tool for me, as it provides valuable data on the potential performance of my strategies before applying them in real markets. It allows me not only to optimize my strategies but also to manage risks and increase my confidence in my trading decisions.
I recommend doing backtesting at least twice a week, even if you are profitable; it is a very powerful tool.
Are people still backtesting in trading? Those people must be novices in this "game." Backtesting is a very useless way to know if a strategy will work or if a trader will be successful in trading, they simply don't work. The reliable means of knowing the true capability of a trading system or the expertise of a trader is by forward-testing. This is a live testing activity that will truly show how your strategies work in real market conditions and also put you in live psychology issues in reality with the market's true dynamics.