Exploring the space of combinations without a clear and well-defined methodology quickly leads to statistical distortions such as data snooping, multiple-test bias and overfitting. As the number of tested combinations increases, the probability of adapting a model to historical noise rather than to an underlying market structure also increases. Once introduced, these distortions become difficult to identify and even more difficult to correct retrospectively.
For this reason, the development of a trading system should not be viewed as a simple optimisation exercise. It is a structured decision-making process that progressively transforms market observations into objectively testable models through formalisation, validation and implementation.
The framework presented below provides the structure that guides this progression. While it cannot eliminate uncertainty or predict future market behaviour, it ensures that every stage of development follows a consistent, replicable and objectively verifiable methodology.
