Memory - Library for MetaTrader 5 | MT5 EA Download - MetaTrader 5 Resources

During optimization, in Tester, you may experience pass crashes due to insufficient memory.

There is a way to calculate such emergency passes. However, Expert Advisors consume a lot of memory, making it difficult to evaluate all variations of input parameters.

You need to find potentially problematic configurations of input parameters of existing Expert Advisors. Then find out why.

This simple library allows you to track dynamic changes in memory consumption in a fairly simple way.

To illustrate, we take a concise EA and add a few lines to it (highlighted).

 #property tester no cache

#Define memory tester optimization // Operate in tester optimization mode.
#include //Memory consumption monitoring.

Enter integer maximum MB = 10 ; blank check ()
{
static Mql rate rate[];
 
Constant integer size MB = ( array size (price) * size ( Mql rate )) >> 20 ;
 
if (SizeMB < inMaxMB)
Array resize (rate,((SizeMB + 2 ) << 20 )/ size ( Mqlrate )); // Increase the array by ~MB. } double tester ()
{
Return (gMemory.GetMax()); // Maximum memory consumption during program execution. }

The Expert Advisor simply increases its array.

The picture shows the result after optimization.

Memory consumption measurements are similar.

A single pass of the top group will produce this effect.

 Core 1 Tester Result 102 Core 1 2026.02 .10 23:58:58 MQL_MEMORY_USED: Min = 0 Max = 102 Last = 0 Core 1 EURUSD, M1 : 80954 ticks, Chapter 1437 generated bar chart. Environment sync at 0 : 00 : 00.020 . Test passed at 0 : 00 : 01.781 .
Core 1 EURUSD,M1: Total time from login to stop test 0 : 00 : 01.801 (including 0 : 00 : 00.020 for historical data synchronization)
The Mb memory used by Core 1 Chapter 202 includes 23 MB of historical data and 64 MB of scale data.

The library allows you to discover excessive memory consumption of Expert Advisors and further investigate the cause in debug mode.

The less resources the EA consumes - the more opportunities there are for optimization: the increase in the number of test agents - the speed of optimization.

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Attachment download

📎 Memory.mqh (25.5 KB)

📎 Memory_Example.mq5 (0.7 KB)

Source: MQL5 #69335