Advanced Guide To MetaTrader 4 - Scripts
AAA
  1. Advanced Guide To MetaTrader 4 - Introduction
  2. Advanced Guide To MetaTrader 4 - Automated Trading
  3. Advanced Guide To MetaTrader 4 - Expert Advisors
  4. Advanced Guide To MetaTrader 4 - Custom Indicators
  5. Advanced Guide To MetaTrader 4 - Scripts
  6. Advanced Guide To MetaTrader 4 - Strategy Testing And Optimization

Advanced Guide To MetaTrader 4 - Scripts

Scripts are programs that are intended to perform a single action. Unlike an indicator or Expert that works continually, a Script stops functioning once it has completed its function one time. Like Custom Indicators, Scripts are created, setup and launched in much the same manner as Experts. When launching the Experts Wizard, select "Scripts" as the object to be created. Continue in the same manner as creating an Expert or Custom Indicator (see the Expert Advisor Creation and Custom Indicator Creation sections of this tutorial).

To set up Script parameters, open the Options window and select the "Expert Advisors" tab. To open the window:

  • In the Main Menu > Tools > Options; or
  • Pressing CTRL + O on the computer keyboard.
Five options influence the operation of Scripts:

  • Allow live trading - to enable Experts in real-time mode (rather than testing an Expert on historical data).
  • Ask manual confirmation - to send trade confirmation prior to submitting the order.
  • Allow DLL imports -to use DLLs to enhance Expert functionality.
  • Confirm DLL function calls - to allow control over the execution of each called function.
  • Allow external experts imports - to allow the Expert to access functions from other Experts or MQL4 libraries.
Removing a Script
A Script automatically shuts down once it has completed its function one time. Traders can, however, remove a Script manually. To remove a Script from a chart, right-click on the chart and select "Remove Script," as shown in Figure 20.

Figure 20 - To remove a Script from a price chart, right-click on the chart and select "Remove Script" from the chart context menu.

Options for Non-Programmers
People who are not interested in learning how to program in the MQL4 language can still take advantage of Experts, Custom Indicators and Scripts. A growing number of commercially available products can be purchased at various trading-related businesses online, and MT4 users can also hire a qualified MQL4 programmer to perform the coding.

It is important to note that when working with a programmer, all ideas must be quantifiable and objective. For example, if the trader wants to enter a long position when price goes above a moving average, he or she will have to specify the moving average length, the precise entry point (next bar on open, for example) charting interval and even the trading instrument. Most programmers will not accept jobs that entail a lot of guesswork on the part of the programmer, and so project specifications need to be absolutely clear.

In general, if a commercial Expert, Custom Indicator or Script has been purchased, it will come with specific installation instructions. Similarly, a programmer will typically include instructions for installation. It is always valuable to read the instructions before attempting the installation to avoid any complications. Advanced Guide To MetaTrader 4 - Strategy Testing And Optimization

  1. Advanced Guide To MetaTrader 4 - Introduction
  2. Advanced Guide To MetaTrader 4 - Automated Trading
  3. Advanced Guide To MetaTrader 4 - Expert Advisors
  4. Advanced Guide To MetaTrader 4 - Custom Indicators
  5. Advanced Guide To MetaTrader 4 - Scripts
  6. Advanced Guide To MetaTrader 4 - Strategy Testing And Optimization
RELATED TERMS
  1. Paper Trade

    Using simulated trading to practice buying and selling securities ...
  2. Prime Of Prime - PoP

    A brokerage that provides service to traders (especially Forex ...
  3. Digital Currency Exchanger - DCE

    A market maker who exchanges legal tender for electronic currency, ...
  4. Bid And Asked

    A two-way price quotation that indicates the best price at which ...
  5. No Dealing Desk

    A way of forex trading that provides immediate access to the ...
  6. Micro-Lot

    The equivalent to a contract for 1,000 units of the base currency ...
  1. How do I implement a Forex Signal System into a forex trading strategy?

    Learn how traders use different types of forex signal systems such as trend-based or range-based to create or supplement ...
  2. Who are cambrists and how do I become one?

    Discover what a cambrist is, why they are important to exchange markets and what skills you should possess if you are interested ...
  3. How do you know if a trade placed to a broker is confirmed?

    Learn how to check if trades placed with brokers online or over the telephone have been filled and confirmed. Explore different ...
  4. How can I trade in cross currency pairs if my forex account is denominated in U.S. ...

    The forex market allows individuals to trade on nearly all of the currencies in the world. However, most of the trading is ...

You May Also Like

Related Tutorials
  1. Trading Systems & Software

    Beginner's Guide To J-Trader

  2. Trading Systems & Software

    Beginner's Guide To CQG Integrated Client Trading Platform

  3. Trading Systems & Software

    Guide To Smartphone Forex Apps

  4. Trading Systems & Software

    Automated Trading with MultiCharts

  5. Trading Systems & Software

    Forex Broker Summary: Easy Forex

Trading Center