MQL4 Math, Indicator Functions, and Signal Detection Basics
Summary
This beginner lesson surveys MQL4’s built-in mathematical functions, including rounding, absolute value, powers, logarithms, exponentials, remainders, and pseudorandom number generation. It explains practical details such as how rounding behaves for negative numbers, why trigonometric inputs use radians, and how a seed affects repeatability of random sequences.
The article also introduces functions for working with technical indicators and demonstrates tracing a simple trading signal. Further language topics include arrays, passing values back through reference parameters, and block comments. The material is a programming primer rather than a tested trading method: the indicator example is intended to teach function use, and no strategy performance evidence is supplied. Some explanations are simplified for beginners, so readers should check platform-specific behavior when applying the examples in production code.
Key ideas
- MQL4 math functions cover common operations such as rounding, logarithms, powers, and remainders.
- Trigonometric functions take angles in radians, so degree values need conversion.
- Pseudorandom sequences can be made repeatable or changed by setting their seed.
- Reference parameters let a function modify caller variables and return multiple values.
- Indicator functions can help detect trading signals, but the lesson does not establish strategy profitability.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.