The PnL (Profit and Loss) is the key metric for any serious trader or investor. It's not just about how much you earn, but about understanding your decisions, your risks, and your consistency. A good PnL reflects discipline, emotional management, and a clear strategy. It's vital to keep a detailed record to spot patterns, mistakes, and opportunities for improvement. Celebrating gains is fine, but analyzing losses is what really makes you grow. In the world of trading, the PnL does not lie: it is your financial mirror.
