This code is from Lecture 8 in the folder "Tutorial and Documentation" in Notebook. There is one error if you run it:
"ImportError: cannot import name add_history".
add_history is not used in zipline anymore by google search. If I remove add_history from import list, then it shows up with another error:
"RemoteDataError: Unable to read URL: http://www.google.com/finance/historical"
I do not know how to fix it. Anybody can help?