Check History Function
Info
The Check History Function is a Library for MetaTrader 5 that function to check and load history:this is a modified version of the metaquotes checkloadhistory function. Title:Usage:The history of changes:2026.
Usage
This tool is typically used for enhancing chart analysis and decision making.
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 Check History Function
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
Function to check and load history:This is a modified version of the MetaQuotes checkloadhistory function.
Typical Use Case
This Library excels in automated trading and technical analysis 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.
Function to check and load history:Also recommended: Weekends Check Function - similar library with strong performance on MetaTrader 5.
This is a modified version of the MetaQuotes checkloadhistory function.
Title:
Usage:
The history of changes:
2026.02.18:
- Added a maximum time limit for downloading historical data from the server. The default value is 30 seconds.
Source Code
#property copyright "robotfx"
#property link "https://robotfx.org"
#property version "2.0"
#define max_waiting_time 10000 //
uint starttickcount=0;
bool checkloadhistory(const string symbol,const enum_timeframes period,const int size,bool print_info=true)
{
if(mql5infointeger(mql5_program_type)==program_indicator && period()==period && symbol()==symbol) return(true);
if(size>terminalinfointeger(terminal_maxbars))
{.......
⚠ 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.