In the fast-paced and ever-evolving world of trading, where decisions are made in seconds, the importance of thorough preparation cannot be overstated. Backtesting trading stands as a critical tool in a trader's arsenal, offering a way to test and validate trading strategies using historical market data. This process provides invaluable insights into the potential performance and risks associated with a strategy before real capital is put on the line. Here, we explore the top seven reasons why a backtesting platform is crucial for trading success, focussing on its pivotal role in optimising strategies and mitigating risks.