Select data of corresponding Symbol in MultiSymbol EA

Hi everyone,

I wish to implement my EA on several symbols (I wish to create such a scanner so I would like to avoid open multiple charts) and I have a doubt.

If I create an array with those symbols (e.g. string symbols["AAPL","MMM",...]) and in the OnTick() function I set a for loop, like:

for(int i = 0; i < ArraySize(symbols); i++)
{
string symb = symbols[i];
//...
long voltemp = Volume[i]; // ??? Is that changing every loop to select symbols[i]'s Volume?
//...
}

The special array Volume (but like all others, Close, High, Low, ...) are automatically set on that symbol or I have to set another option to "select" each symbol and get correspondent data?

Thank you very much!