The problem I have is that, when multiple programs connect to the same MT5 terminal.exe, the performance degrades & one or more python programs exit with errors. To overcome this, I have installed multiple copies of MT5 & have updated the python code such that different copies of python program use different installations of MT5. However, only the first installation of MT5 is the only one that can be invoked by all the python programs. Trying to use any other terminal.exe from other installation raises an exception & the connection fails.

In my experience MT5 tries to use latest open MT5 Terminal. I mean if i run another terminal meanwhile code using MT5 Terminal even if i installed in another drive my code starts to manuplate my terminal.


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MQL recently launched its web terminal and its seperate from MT5 terminal as you run it from internet. I heard its can be used by mql5 and i want try my code use web terminal somehow for solve this issue. Yet i didn't find any documentation about it. Probably itsn't possible with python either. But i guess mql5 language may solve most of our problems with web terminal use.

Which kind of data from the MT4/5 terminal can be populated into the data array?

How can that data be formatted? Is it possible to format it as json straight away or should that be done on the server-side?

In the new MetaTrader 5 version, we have added an API which enables request of MetaTrader 5 terminal data through applications, using the Python high-level programming language. The API contains multiple libraries for machine learning, process automation, as well as data analysis and visualization.

For this, metatrader.live may help. The question is just to attach an (open-sourced) expert advisor and have the data online through JSON or WebSockets or something. OR You can use it as a transport layer only for your own logic. Easy enough. And yes, I'm the author :)

Call of Imported Functions

 To import functions during the execution of a mql4-program, the client terminal uses early binding. This means that if a program has call of an imported function, the corresponding module (ex4 or dll) is loaded during the program load. MQL4 and DLL libraries are executed in the thread of a calling module.


 It is not recommended to use the fully specified name of the module to be loaded like Drive:\Directory\FileName.Ext. The MQL4 libraries are loaded from the terminal_dir\MQL4\Libraries folder. If the library hasn't been found, then the client terminal performs an attempt to load it from terminal_dir\experts folder.


 The system libraries (DLL) are loaded by the operating system rules. If the library is already loaded (for example, another Expert Advisor, and even from another client terminal, running in parallel), then it uses requests to the library already loaded. Otherwise, it performs a search in the following sequence:

 - Directory, from which the module importing dll was started. The module here is an Expert Advisor, a script, an indicator or EX4 library;

 - Directory terminal_data_directory\MQL4\Libraries (TERMINAL_DATA_PATH\MQL4\Libraries);

 - Directory, from which the MetaTrader 4 client terminal was started;

 - System directory;

 - Windows directory;

 - Current directory;

 - Directories listed in the PATH system variable.


 If the DLL library uses another DLL in its work, the first one cannot be loaded in case when there is no second DLL.

The MetaTrader 5 web terminal is a new financial trading platform launched by MetaQuotes to allow users to trade stocks, Forex, commodities, metals, indices, and futures from any device and browser in one platform.

The new web terminal is fast, modern, and secure. It has eliminated some features, such as chart context and top menus, and incorporated a simplified user interface with all chart commands, objects, and indicators.

The client terminal includes a built-in editor and compiler with access to a user contributed free library of software, articles and help. The software uses a proprietary scripting language, MQL4/MQL5,[13][14][15] which enables traders to develop Expert Advisors, custom indicators and scripts. MetaTrader's popularity largely stems from its support of algorithmic trading.

The first reason is to login into separate MT4 accounts at once. You can log in only into one MT4 account from the same broker, but if you have more MT4 terminals installed, then you can log into other accounts at the same time.

The third reason is to backtest or optimize multiple Expert Advisors at the same time. Each MT4 terminal can run only a single EA in the Strategy Tester. But you can run many Strategy Testers if you have many MT4 terminals.

Installing several MT4 terminals on the same computer is very easy. You need to repeat the same procedure as if you would install a single MT4 terminal, except that you need to choose a different location for each installation. So this means you can install multiple MT4 platforms even from the same broker or different brokers.

Notice the numbering at the end of the folder name? It will help you identify terminals and keep all installation files in different folders. You can give folders whatever name you want, but make sure that each name is unique.

I also have a VPS server with a multi-core CPU, and they work great without any individual optimization. Note that most VPS servers do not run MT4 terminals well with multi-core CPU, but there is this special optimization of MT4 you can apply.

In theory, there is no limit as to how many MT4 terminals you can run on a single machine; the limit comes from the actual hardware specifications. On an average computer, you should be able to run at least four platforms with no trouble.

Hi Rimantas.I have downloaded mt4 multiterminal exe.and tried as you explained.but i have some problems with it.i have some real and demo accounts on different brokers.firstly i have tried to open on terminal my demo account opened at indigodma.but on the settings where i wanted to put on the server location it does not allow me to change the location.there is only metaquotes demo-meta quotes corporation. location.what should i do?may be becouse it is sunday today,or it does not mean anything?

You need a separate mt4 platform for each account and all platforms must be running on a pc or vps for a copier to work

Here is the best way to install multiple mt4 platforms on one machine

 -coder.com/setup-multiple-mt4-terminals/

You should now have an understanding of how you can trade and invest using a wide variety of instruments through your internet browser with the MetaTrader web terminal.The best way to familiarise yourself with the MetaTrader WebTrader is to head over and give it a go yourself! If you are new to trading, or just want to practise whilst getting used to the web trading platform, it might be a good idea to trade with a demo account before heading for the live markets.Trade Forex and CFDs with AdmiralsIf, however, you feel ready for the live markets, you might be interested to hear that, with a Trade.MT5 account from Admirals, you can trade Contracts for Difference (CFDs) on a wide range of instruments, including Forex, commodities and stocks. Click the banner below to open an account today:Trade Forex & CFDsGet access to over 40 CFDs on currency pairs, 24/5

LIMASSOL, Cyprus, March 16, 2023 (Newswire.com) - MetaQuotes, the company behind the world's most popular trading platform, MetaTrader 5, has announced the addition of a range of new color templates for its web terminal.

Previously, the company has repeatedly received proposals to introduce new color schemes from traders and brokerage companies. New templates incorporate traditional color combinations and night mode, offering users a total of eight options to choose from. These color templates can be accessed in the Color Templates section of the web terminal.

New color templates for the web terminal are designed to make it more efficient and comfortable. This is one of the many planned improvements to the web terminal, demonstrating the commitment in providing the best possible trading environment and user experience.

I faced similar problem. Using wine in Ubuntu was fine, when running it inside a docker container the Proxy error appeard. I bypassed it following this thread on MQL5 forum . I didn't run the installer, but copied the 'MetaTrader 4' folder to '/home/mt4/drive_c/Program Files (x86)/' then runned terminal.exe with wine works. I think the issue is only for the installer. I know it do not solve the main problem but like that I can run the program inside docker. I did not try using PlayOnLinux because already configured lot of stuff in order to use wine for my purpose.

To save the Indicator or Expert Advisor Preset, go to the "Inputs" tab and click the "Save" button. Then, enter the path for saving the preset file. It is usually in the Presets folder, in the catalog of the MT4 terminal.

Go inside the folder of the first instance (1) and you will see the file terminal.exe (There are usually two of them. Always choose the EXECUTABLE file and not the icon file. Please see the image below to see which one.) Right-click it and select Send to > Desktop (create shortcut). Doing this will create a shortcut of this file to your desktop which makes it convenient for you to launch your first MT4 instance.

MT4 is thought to be the most popular trading platform. However, LiteFinance software designers offer even a more interesting product. The LiteFinance trading terminal is more straightforward and user-friendly, visually convenient, without being overloaded with ample functions. It does not suggest trading using Expert Advisors or uploading custom indicators. However, you can build both active and passive trading strategies based on the LiteFinance trading terminal, which is not provided in the MT4. Read on, and you will learn more about the benefits of the LiteFinance trading platform compared to the MT4. ff782bc1db

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