Structured MetaTrader Logging with Severity Levels and Seq
Summary
The article presents a logging approach for MetaTrader applications that standardizes messages with severity levels, module and function names, and structured message text. A Logger class writes to the Experts journal and can also send events to Seq, where JSON storage and queries support searching and reviewing application activity. It also describes importing existing terminal logs into Seq with a Python package.
The author distinguishes debug, informational, warning, error, and fatal messages, and explains that terminal log timestamps use local time while trading data may refer to server time. Seq timestamps are formatted with millisecond ordering information, though the underlying MetaTrader datetime has only second precision. Examples show structured output and event viewing; the article gives no evidence that the setup improves trading performance. It is an operational technique for diagnosing and auditing Expert Advisors, and relies on configuring Seq, terminal WebRequest access, and the log importer.
Key ideas
- Use consistent severity levels to communicate the urgency and purpose of log messages.
- Include module, function, and structured message details to make logs easier to filter.
- A Logger class can write to the terminal journal and optionally forward events to Seq.
- Account for the difference between local journal time and server time in trading messages.
- Existing MetaTrader logs can be imported for query-based analysis, subject to setup requirements.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.