New article - MQL5 Cookbook: Developing a Multi-Currency Expert Advisor with Unlimited Number of Parameters
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New article MQL5 Cookbook: Developing a Multi-Currency Expert Advisor with Unlimited Number of Parameters is published:
The multi-currency Expert Advisor considered in the previous article "MQL5 Cookbook: Multi-Currency Expert Advisor - Simple, Neat and Quick Approach", can be very useful if the number of symbols and trading strategy parameters used is small. However, there is a restriction on the number of input parameters of an Expert Advisor in MQL5: they should be no more than 1024.
And even though this number will very often be sufficient, it is very inconvenient to use such a huge list of parameters. Every time a change or optimization of parameters for a given symbol is required, you have to search parameters for that specific symbol in the long parameter list.
In this article, we will create a pattern that uses a single set of parameters for optimization of a trading system, while allowing for unlimited number of parameters. The list of symbols will be created in a standard text file (*.txt). Input parameters for each symbol will also be stored in files. This way we will be able to circumvent the restriction of the terminal on the number of input parameters of an Expert Advisor.
Author: Anatoli Kazharski