>> MQL4 file

MQL4 file format description

Many people share .mql4 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .mql4 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .mql4 files.

1 filename extension(s) found in our database.

.mql4 - MetaTrader MetaQuotes Language 4 File

The MQL4 development files are related to MetaTrader 4. The MQL4 file is a MetaTrader MetaQuotes Language 4 File. MetaTrader is a software platform that is independent of the forex broker. MetaQuotes Language 4 (MQL4) is a built-in language for programming trading strategies.

MetaTrader 4
Development files
- / -
mq4, mql
MetaTrader MetaQuotes Language 4 File related extensions:
WebDev AWP Page Library
Visual FoxPro Database
Visual FoxPro Compiled Program
WinDev Mobile Window Data
WebDev WebService Library
WebDev Query Backup Data

Naturally, other applications may also use the .mql4 file extension. Even harmful programs can create .mql4 files. Be especially cautious with .mql4 files coming from an unknown source!

Can't open a .mql4 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .mql4 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ml4, mq4, mql

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Milestones v4 Project
MultiLedger Customers Data
MetaQuotes Language 4 Source Code
MetaTrader MetaQuotes Language 4 File

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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