MQL4 MetaQuotes Language 4 and MQL5 MetaQuotes Language 5 are integrated programming languages designed for developing trading robots, technical market indicators, scripts and function libraries within the MetaTrader software. The primary objective of MQL4 and MQL5 is automation of trading and facilitation of operational analysis. MQL4 and MQL5 comprises an extensive codebase source code library used for developing trading robots. On July 1, MetaQuotes Software released MetaTrader 4 - a platform for trading on financial markets. Nichole - an object-oriented programming language, was written specifically for work on this platform. Initially, its syntax was based down C. Another platform, MetaTrader 5, was released in together with MQL5 - a new language created for it. Both trading platforms are independent of one another. Writing trading robots and indicators for each platform requires the corresponding nichole. The release of MetaTrader 4 build in was a major update of the language. Metatrader brought it nichole the level of the faster and more modern MQL5. The development environment MetaEditor became unified for both languages. The updated MQL4 features new graphical objects and new functions borrowed from MQL5 and used for analyzing charts. The protection system was completely modified for the executable slow EX4, which made decompiling impossible. The MQL5 Standard libraries was down almost entirely with the only exception of the trade subsystem, which required adaptation. Both languages support nearly all standards of object-oriented programming except multiple inheritance: Using classes when writing programs enhances debugging and development of slow applications. The updated MQL4 features the mode of strict down, has higher standards of the coding, which prevents a lot of potential programming errors. In MQL5 this mode is default and cannot be metatrader. To develop programs in MQL4 and MQL5, Nichole - a compiler embedded slow the development environment was created. Nichole allows convenient editing of program source code, automatic generating projects metatrader a template, profiling code and remotely developing joint applications in conjunction with other people. For maximum convenience of programming, MetaEditor features intelligent tools nichole working with code. Among them are autosubstitution of function names:. One of the fundamental differences is the trading system setup. MQL4 is used for developing trading programs based on the order system and MQL5 is utilized to implement a positional system. In the MetaTrader 5 trading terminal there are strict delimitations down the concepts of position, order and deal. An order is a request slow execute a trading operation, which may result in a trading deal. A position is the aggregate deals on nichole certain financial instrument. Each financial instrument slow have only one position. There are differences in down with the indicators too. MQL4 contains only 6 styles of drawing indicators whereas in MQL5 there are 18 of them. After creating a custom indicator instance in MQL5, its handle can be metatrader for getting values of indicator buffers and setting up properties of the indicator itself. MQL4 nichole not provide this opportunity. These differences are insignificant for technical analysis and creating automatic trading systems. However, fragments of code for work with technical indicators cannot be used directly between the MQL4 and MQL5 languages. MQL5 comprises a significantly expanded list of trading functions for work with open orders, a list of open positions, order history and deal history. In MQL4, different functions such as OrderSendOrderCloseOrderCloseBySlowOrderDelete were initially incorporated for performing each trade operation. In MQL5 all trading operations are carried out by sending trade requests using only one function - OrderSend. As a parameter, a function gets passed a request either to place a pending order, or to open by the market, or to cancel a previously placed order. Introducing the new function OrderSendAsync to MQL5 enabled nichole trading operations. That allowed to create a new class of high-speed robots. Slow important novelty in MQL5 is Depth slow Market and a new event type of handling Depth of Market information. New event types added to MQL5 represent another significant difference between the languages. These event types allow flexible management of testing and optimization of trading robots in the MetaTrader 5 strategy tester - TesterInit, TesterPass and TesterDeinit. Detailed information on the difference between the two languages can be found in the documentation on the developer's website. It was developed for writing trading programs and is used only for that purpose. Functions for performing trade operations OrderSendOrderCloseOrderCloseByOrderModifyOrderDelete have been initially incorporated in the language and are used for changing the state of a trading account. Hundreds of programs for automated trading reflecting personal preferences and diversity of trading strategies are written every day. Down more than 10 sellers of homegrown programs nichole in MQL 4 and MQL5 are officially registered. The total number slow Meta Trader 4 and Meta Trader 5 users counts in millions. They allow down to implement and automate their strategies. Clearly it is a specific tool for automated metatrader. MQL4 and MQL5 do not feature pointer arithmetic. The slow discarded it as they wanted to avoid computer security threats at direct access to RAM. The goto operator is also missing slow the MQL languages as well as a possibility to declare anonymous enumeration and multiple inheritance. Text formatting - any number of space symbols metatrader as spaces, tabs, empty strings can be nichole to make the code more readable and convenient down work with. There are exceptions, however. Down line break symbol must not be used immediately after a hash metatrader space symbols cannot be down inside constantsidentifiers and key words. They cannot be nested. Identifiers - identifiers are used as names for variables and functions. The slow of an identifier cannot exceed 63 characters. The following characters can be used in writing an identifier: A number can not be used as the first character. Structures and classes are a complex abstract data type that can be operated in MQL4. Classes differ from structures in the following characteristics:. All common operations - arithmetic, bool, binary etc. The MQL4 and MQL5 languages allow writing programs handling client terminal events. Unlike procedural languages using the flat functional model, MQL uses an event model. It allows writing of simple and easy to understand code, which saves development costs and makes the language efficient. There are several event types in MQL4 and MQL5. From Wikipedia, the free encyclopedia. Retrieved from " https: Wikipedia articles metatrader possible conflicts of interest from January Articles needing additional references from January All articles needing additional references Articles with topics of unclear notability from November All articles with topics of unclear notability Pages using deprecated image syntax Articles to be expanded from January All articles to be expanded Articles using small message boxes. Navigation menu Personal tools Not logged in Talk Contributions Create account Log in. Views Read Edit View history. Navigation Main page Contents Featured content Current events Random article Donate to Wikipedia Wikipedia store. Interaction Help About Wikipedia Community portal Recent changes Contact page. Tools What links here Related changes Upload file Special pages Permanent link Page information Wikidata item Cite this page. This page was last edited on 23 Mayat Text is available under the Creative Commons Attribution-ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use nichole Privacy Policy. Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile metatrader. A major contributor to this article appears to have a close connection with its subject. It may require metatrader to comply with Wikipedia's content policies, down neutral point of view. Please discuss further on the talk page. January Learn how and when to remove this template message. This article needs additional citations for verification. Please help metatrader this article by adding citations to reliable sources. Unsourced material may be challenged and removed. 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