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Metatrader 4 print function zener
Special functionsThe distinctive feature of programs intended for operation in the client terminal MetaTrader 4 is their work with constantly updated information in real time. In MQL4 language, this peculiarity is reflected in the form ptint the three special functions: init(), start(), and deinit().Special functions are functions with predefined names init(), start() and deinit(), each possessing its own special properties.Properties of special functionsCommon property of special functionsThe main property of all special functions is their execution in a program under certain conditions without using a special function call from within the program.
Special functions are called for execution by the client terminal. If a program contains the description of a special function, it will be called (and executed) in accordance with the calling conditions (and its own properties). The tunction of parameters cannot exceed 4.NoteArrays cannot be passed to the Print() function. Arrays must be input element-by-element.Data of double type are shown with the accuracy of up to 1 digits after a decimal point, and can be output either in traditional or in scientific format, mwtatrader on what entry will be more compact.
Data of float type are output with 5 digits after a decimal point. Dates are shown as YYYY.MM.DD HH:MI:SS. To show data in another format, use TimeToString(). Data of color type are returned either as R,G,B line or as a color name, if megatrader color is present in the color set.Print() function does nStandard FunctionsAl in all there are more than 220 standard functions in MQL4, this metatrader 4 print function zener apart from functions of technical indicators.
It is impossible to include here descriptions and examples of all functions, because there are too many of them. Some functions that need to be described in details are included into previous sections. In this section we will dwell on other most widely used functions. This group includes functions that are used for programmed creation such objecFunctionsEvery task can be divided into subtasks, each of which can either be directly represented in the form of a code, or divided into smaller sub-tasks.
This method is called stepwise refinement. Metatrader 4 print function zener are used for writing the code of sub-tasks to be solved. The code that describes what a function does is called function definition. The function header includes a description of the return value type, name ( identifier) and formal parameters. The number of parameters passed to the function is limited and cannot exceed 4.The function can be called from other parts of the program as many times as necessary.
The print feature only prints one page of data (candles) but the page size can be of any dimensions (including custom sizes defined in metatradr control panel). Printing can be of recent or historic data, just turn off chart scrolling for the later.
Print function 4 zener metatrader