Backtesting

Backtesting is an essential technique for evaluating the viability and performance of a trading strategy using historical data. It involves applying the rules of a specific strategy to past data to simulate its behavior and analyze its results (gains, losses, drawdown, etc.). This process allows you to quantify the potential of the strategy, identify its strengths and weaknesses, and optimize its parameters before implementing it in real market conditions. The main objective of backtesting is to provide an empirical basis for making informed decisions about the use of a trading strategy. It allows you to verify whether a theoretical idea actually works in practice, and to adjust the rules of the strategy to improve its profitability and reduce its risks. A rigorous backtest must take into account transaction costs (commissions, slippage), realistic market conditions, and avoid over-optimization bias (adapting the strategy to past data excessively, making it ineffective in the future).