Hi,

I am new to Zorro and want to develop strategies using M1 data (1-minute data).

I have read the documentation on data history download and checked download.c function, but I don't understand what are best options to download M1 data.

Is IB a good source for M1 data or should I try with IQFeed or some other source?

I have several questions about using IB as the broker for M1 data:
1. Is it possible to download adjusted data or just unadjusted?
2. How to provide a symbol list I want to download (for example SP500 symbols)?
3. How Zorro control for symbol changes and survivorship bias?
4. Do I have to open TWS or Gateway before data download?

Is there documentation for more info on these questions (I have already read docs on history data download)