Discussing the article: "MetaTrader 5 as a Kafka Producer: Event-Bus Architecture for Multi-Terminal Signal Fan-Out"
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Check out the new article: MetaTrader 5 as a Kafka Producer: Event-Bus Architecture for Multi-Terminal Signal Fan-Out.
The article details a native MQL5 Kafka producer that speaks the wire protocol over raw TCP. It implements RecordBatch v2 encoding, varints, and CRC32C, and adds batching, acks, and retry logic, all without a sidecar or DLL. Use it to publish JSON-structured trading signals from a single terminal to Kafka, where dashboards and other services subscribe independently.
Every bridge article in this series so far has solved a one-to-one problem. A Rust cdylib call serves a single caller. A shared-memory mapping links exactly two processes on the same machine. A gRPC channel serves one client talking to one server. All of them are point-to-point, and all of them assume you know in advance who's on the other end.
That assumption breaks as soon as you need a signal desk rather than a single robot. Suppose one MetaTrader 5 terminal computes a momentum signal on XAUUSD. You need it delivered to a monitoring dashboard, a risk-sizing service, and two mirror terminals trading correlated pairs — without the producer knowing how many listeners exist or whether they are currently online. That's not a bridge problem anymore. That's an event bus problem, and the industry-standard tool for it is Apache Kafka.
This article shows how to build a native Kafka producer in MQL5, without an external DLL, a Python sidecar, or ALGLIB. Just raw TCP sockets and a hand-rolled implementation of Kafka's wire protocol: varint encoding, CRC32C checksums, and the RecordBatch v2 binary format that every modern Kafka broker expects. By the end, your EA will be able to publish structured trading signals straight onto a Kafka topic, where any number of independent consumers can subscribe, replay history from any offset, and never once touch your MetaTrader 5 terminal.
Author: Olamide Daniel Adebayo