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Using MQL5 WebRequest for Automated Message Posting

Article MQL5 code base
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Summary

The document describes how an MQL5 script can use WebRequest to send data to a web service and gives automatic message posting as its example. It distinguishes a simpler call option for basic requests from a more flexible option that supports request types such as GET, POST, and HEAD, along with user-specified headers. The example is framed around posting a message to an MQL5 site and can include an image stored in the platform’s files folder, with a matching MIME type.

It suggests that the same mechanism could publish market analysis or price forecasts automatically, but provides no evidence about forecast quality, reliability, or suitability for trading decisions. The example requires account credentials, and the document does not discuss credential protection, service permissions, or operational safeguards. It also notes that certain headers, including Host, are set or ignored by the function rather than controlled by the caller.

Key ideas

  • MQL5 WebRequest supports a basic request mode and a more flexible mode with request methods and custom headers.
  • A script can use the flexible mode to submit a message and an image to a web service.
  • Image uploads require a file in the platform’s files folder and an appropriate MIME type.
  • The example uses account credentials, but gives no guidance on protecting them.
  • Some headers are controlled by WebRequest or derived from the URL rather than accepted from the caller.

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.