MQL 4 is a programming language used to create scripts as well as custom indicators, expert advisors, and even libraries. It is not a beginner’s programming language, and for that reason, when a business needs work on a project of the nature the language covers, they hire MQL 4 professionals and consultants on Upwork. But what would a business need these experts to write for them?
Scripts are one of the major areas the language is used for, and these are the everyday commands submitted to computers in order to perform different operations. These can be general commands as well as specific ones such as analyzing charts or generating statistical information. Then there are custom indicators that are used to make create charts or other visuals. These operate at a much more complex level, with every tick on a chart or every function needing its own custom indicator. Expert advisors are used in financial programs and most often in financial market trading software. Finally, libraries in computer terms are sets of functions that perform specific tasks. In a financial business, this could be used to decide when to sell and when to buy.
What this all means is that working within the MQL 4 language isn’t something that can be done by just anyone without expert knowledge. Training and experience are required to be able to use the different features of the MQL 4 language and ensure that what’s created with it is functional and fit for its purpose.