I am struggling to figure out how it works to get the feed data for testing?

I am using MT4 demo, I am able to run other script such as Workshop 7 to trade as Zorro will log into the MT4 demo account using the data from MT4.

When it comes to writing new script and testing with it, where would the data be coming from? Should I use the download script to download data or should I use the MT4 demo a/c to let Zorro to get the feed? I don't think it works at the moment.

It would be appreciate someone to explain in details since I just installed Zorro yesterday and trying to familiarize with it.

Anything that i have to modify?

Also I don't seem to see that Zorro will recognize USOil as an asset symbol? How can I make Zorro to recognize it?