File Extension Search

.mq4 File Extension

Developer: MetaQuotes Software Corp
File type: Indicator File
You're here because you have a file that has a file extension ending in .mq4. Files with the file extension .mq4 can only be launched by certain applications. It's possible that .mq4 files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .mq4 file?

The MQ4 file extension is known as the MetaTrader Custom Indicator File which was designed by MetaQuotes Software Corp. MQ4 file format is the source code of the programs wrote in MQL4 programming language. Source code means they could be opened for viewing or editing in MetaEditor and is essential to change indicator's code. It can be a Custom Indicator, Script, or Library file written in the MetaQuotes Language, which typically includes variables, functions, and comments. Custom Indicator is a technical indicator written independently in addition to those already integrated into the client terminal. Like built-in indicators, they cannot be trade automatically and are intended for implementing of analytical functions only. Custom Indicators are located in the desktop and are stored in terminal_ directory\experts\indicators. MetaTrader is an on-line trading platform designed for financial institutions dealing with Forex, CFD, and Futures markets. Files in MQ4 format can be opened with MetaQuotes MetaTrader in Microsoft Windows platofrms.

how to open a .mq4 file?

Launch a .mq4 file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mq4 file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mq4 files aren't yet associated with it. In this case, when you try to open a .mq4 file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mq4 file will open the correct application. Click here to fix .mq4 file association errors

applications that open a .mq4 file

MetaQuotes MetaTrader

MetaQuotes MetaTrader

MetaTrader is a web-based platform for real-time delivery of updates about the foreign exchange rates. The software consists of two components. The first part runs from the web server, which is managed by the broker. It securely connects to a client-side program that the broker's client installs in his computer and checks often for streaming updates. Clients also use the desktop application to send their purchase orders and offers to sell. The software is available for installation in Windows only, but a mobile version was released in 2005. The 4th edition has an upgraded version of the MetaQuotes Language 4 (MQL 4) that is used in trade strategies programming. The MetaTrader API allows developers to create compatible mobile apps and third-party software, such as plug-ins that extend the functionality of the client software. This software is also used as a financial management tool that keeps a database of the client's buying and selling activities.

a word of warning

Be careful not to rename the extension on .mq4 files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .mq4. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.
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