Math Utils (MT4)
This professional-grade solution for MetaTrader 4 helps traders achieve greater efficiency in their daily workflow. This library provides a collection of modular, reusable code. It is utilized by developers to organize common functions, allowing for the integration of complex logic across multiple Expert Advisors, indicators, or scripts without the need for code duplication.
How to Setup and Use Math Utils (MT4)
1. Storage: Place library files in the MQL/Libraries directory to ensure they are accessible to your projects.
2. Implementation: Include the library in your code using the #import directive, ensuring you match the exact function names and parameters.
3. Compilation: Ensure the library is present in the directory before you compile your main EA or script, as the compiler links them during this phase.
4. Management: Keep libraries organized in sub-folders if you manage many custom functions to maintain a clean project structure.
Frequently Asked Questions
Q: What is a library file used for? A: Libraries store reusable code modules, allowing you to centralize common logic used by multiple EAs or indicators.
Q: Is a library executable? A: No, libraries are non-executable files containing functions; they must be imported into an EA, indicator, or script to function.
Q: Can I update a library while the platform is running? A: You should compile your EA or script after updating a library to ensure the latest code changes are integrated.
Description & Settings
Sometimes, when comparing two double numbers that assumed to be equal, but reached to via different calculations, the comparison goes wrong. Actually A can differ from B by in very little amount (at the 16th decimal place) due to binary rounding errors, so exact comparisons (
==
,
!=
,
>
,
>=
,
<
,
<=
operators) fail.
Real situations of where exact comparison of doubles can fail
Comparing doubles reached via different calculations:
Experts with trailing stop function:
Experts with hidden take profit function:
Comparing price levels in a grid strategy:
Loose Comparison
To avoid unexpected results, it is better to replace exact comparisons (
==
,
!=
,
>
,
>=
,
<
,
<=
), with loose comparisons to overcome the floating-point imprecision. This small library provides the required functions.
