Strategy Configuration via External JSON Files in MQL5: Replacing Input Parameters with a Runtime Config Loader

The brief

MetaQuotes Language 5 (MQL5) developers have introduced a new strategy configuration method. A CJsonConfigLoader and a typed SStrategyConfig allow users to move EA inputs to a shared JSON file. This approach enables users to manage configuration settings in a centralized manner. A custom tokenizer parses the JSON file without requiring additional DLLs. The configuration can be updated at runtime using a hotkey, allowing all instances of the EA to adapt to new settings without reattachment.