Back testing and optimization of a multi symbol EA

 
I have a multi symbol EA that I want to optimize using a high spec PC. Does it use market watch to determine which symbols to include or the setting in the EA where I can list the symbols separated by a comma? 
 
Oliver Henry: I have a multi symbol EA that I want to optimize using a high spec PC. Does it use market watch to determine which symbols to include or the setting in the EA where I can list the symbols separated by a comma? 

Please, ask the author for support on how to back-test and optimise it.