Because MT4 does not have a built-in library for Python, you must use a "bridge" to facilitate communication between the two.
Process the data using libraries like Pandas and NumPy to identify signals, such as a Bullish Engulfing pattern.
Python sends a command (Symbol, Volume, SL/TP) to the MT4 EA. python-mt4
Community-driven projects like mt4pycon or OTMql4Py provide pre-built DLLs and scripts to handle the socket communication for you.
This is one of the most reliable methods. It uses an asynchronous messaging library to create a real-time data feed and send trade commands from Python to an MT4 Expert Advisor (EA) acting as a server. Because MT4 does not have a built-in library
MetaTrader 4 & Python: Bridging the Gap for Modern Algorithmic Trading
A simpler, though slightly slower, approach where Python writes trade orders into a shared CSV file in a specific MT4 folder. An EA then reads this file every few seconds to execute the trade. MetaTrader 4 & Python: Bridging the Gap for
The MT4 EA receives the message and places the order with your broker. ⚖️ Why use Python with MT4? The Definitive Way of Placing Orders to MT4 Using Python