Cerdonarray Class: Efficiency Ratio Calculation for Trend Analysis
Info
The Cerdonarray Class: Efficiency Ratio Calculation for Trend Analysis is a Library for MetaTrader 5 that the cerdonarray class is designed to calculate the efficiency ratio (er), a key component of the adaptive moving average (ama). This ratio reflects the direction of price movement, yielding positive values when prices are rising and negative values when they are falling.
Usage
This tool is typically used for trend following strategies across multiple currency pairs.
Platform
This Library works exclusively on MetaTrader 5 (both build 600+ and newer versions).
Setup
Place the downloaded file in MQL5/Libraries folder via File ? Open Data Folder in MetaTrader 5.
How to Install and Use Cerdonarray Class: Efficiency Ratio Calculation for Trend Analysis
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.
What this tool does
The Cerdonarray class is designed to calculate the efficiency ratio (ER), a key component of the Adaptive Moving Average (AMA).
Typical Use Case
This Library excels in trend following on MetaTrader 5.
Compatible Platform & Setup
This Library works on MetaTrader 5. Place the file in the MQL5/Libraries folder and restart the terminal.
Description & Settings
Related: cdownloadhistory class: historical data download utility - another powerful library for MetaTrader 5 traders.
The Cerdonarray class is designed to calculate the efficiency ratio (ER), a key component of the Adaptive Moving Average (AMA). This ratio reflects the direction of price movement, yielding positive values when prices are rising and negative values when they are falling.Also recommended: Ceronarray Class: Efficiency Ratio Calculation for AMA - similar library with strong performance on MetaTrader 5.
Usage:
The init() method is called with the following parameter:
int aperiod - The period for the efficiency ratio calculation.
The solve() method is called with the following parameters:
const int aratestotal - The rates_total variable from the OnCalculate() function parameters.
const int aprevcalc - The prev_calculated variable from the OnCalculate() function.
double adata[] - The data buffer for indicator calculation.
double aerd[] - The buffer to store the calculated efficiency ratio.
Additional Methods:
int barsrequired() - Returns the minimum number of bars required for indicator calculation.
string name() - Returns the indicator name.
The test_erdonarray.mq5 file serves as a sample indicator demonstrating the application of the Cerdonarray class. The Cerdonarray file should be placed in the MQL5\Include\Incerdonarray directory within your terminal's data folder (create the Incerdonarray folder if it does not exist).
This technical indicator is utilized for constructing a moving average that exhibits low sensitivity to price series noise and is characterized by minimal lag in trend detection. This indicator was developed and described by Perry Kaufman in his 2026 publication "Smarter Trading".
You may also like: bridge - structural design pattern - excellent alternative for library users on MetaTrader 5.
Source Code
#property copyright "robotfx"
#property link "https://robotfx.org"
#property version "1.00"
#property indicator_separate_window
#property indicator_buffers 2
#property indicator_plots 1
#property indicator_label1 "label1"
#property indicator_type1 draw_line
#property indicator_color1 clrred
#property indicator_style1 style_solid.......
⚠ Limitations & Risk Warning
- This tool is provided for educational and testing purposes only.
- Past performance does not guarantee future results.
- Trading involves substantial risk of loss. Use on a demo account first.
- Results may vary depending on market conditions, broker, and settings.
- We recommend thorough backtesting and forward testing before using with real funds.