MetaEditor is one of the most important tools for MQL4 coders. It is essential for making minor changes to the source code and allows users to browse and edit files easily. It has many useful features, including a navigator panel that lets users browse files, option to insert coding elements, and autocompletion.

MQL4 files are text source files that have been compiled into executable code that a computer can run. These files are often EX4 files. These files cannot be read directly. To open these files, you can use a text or Notepad, but the best way to open them is with the MetaTrader program.

You can also use MetaEditor if you are familiar with C++. It What is the Least Amount You Can Trade in Forex allow you to edit source code in MQL4 or MQL5. You can also use this editor as an external compiler for other development environments. The editor also lets you insert DLL files or import Python scripts.