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Navigation: Home > MQL4 file

Informations about the MQL4 filename extension and the file formats associated with it

We collected the information you should know about the .mql4 filename on this page. If you were sent a(n) .mql4 file in an e-mail, but you don’t know what to do with it, then you can find help here. We strive to suggest free, open-source applications that are available to everyone for the file formats.

1 filename extension(s) are in our database

.mql4 - MetaTrader MetaQuotes Language 4 File

The MQL4 file is a Development file, which is connected to the MetaTrader MetaQuotes Language 4 File according to our registry. With the adequate settings, the MetaTrader MetaQuotes Language 4 File (.mql4) files can be opened or converted with the help of MetaTrader 4.

Format description:
MQL4 format
MetaTrader 4
Magic string:
- / -
Related links:
Related extensions:
MQL4 Compiled Modules
MetaQuotes Language 4 Source Code

Important! Programs other than the ones listed above may also use the .mql4 file extension. Even harmful programs can create files with the .mql4 extension to store data in them. Always be careful with .mql4 files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .mql4 file can’t be opened on your computer?

If the program necessary for opening the .mql4 file is installed properly on your computer, then the quickest and simplest way to open the .mql4 file is to double-click on the file’s name. If that doesn’t work, then the right software probably isn’t installed on your computer.

While opening the .mql4 file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .mql4 extension

The .mql4 filename extension can be given incorrectly sometimes. The cause of the error could be a mistake or a simple typo. We found the following incorrectly given filename extensions that are the most frequent in the case of .mql4 files.

ml4, mq4

Maybe you’re not even looking for the .mql4 file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .mql4 extension. It’s possible that the one you’re looking for is among them.

Milestones v4 Project
MetaQuotes Language 4 Source Code
MetaTrader MetaQuotes Language 4 File

Associated applications

The Windows operating system stores information about the applications associated to the file extensions in the registry database. The associations can be queried or modified in the Command Prompt window with the "assoc" command.

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We gladly accept application suggestions, but our primary goal is to suggest reliable, open-source applications that can be freely distributed to the users.

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