2 cents ... you can consider
DataBull : download stock quotes, historical quotes, futures and commodities for data . US$100+ one time fee , 50 exchanges. I am using it .
Btw , for expert advisor, you can attached the expert advisor and then save it as a template.
Once the template is save , you can open multi charts with the expert already attached.
You can also save you own indicators and save it as a template.