Hello Gianluca,
Glad to hear that you liked my job. I appreciate your words.
Regarding your questions, I am not really sure if I understand you…do you mean if one EA can open many trades on one asset?
If the EA is from EA Studio, it will open just one trade at a time, and it will not open a second one before the first one is closed.
If the EA is from FSB Pro, there is the option to add to the position according to different rules.
Let me know if I answered the question or you wanted to ask something else.
Cheers,