I have recently installed Zipline and ingested Quandl data. However, it seems that Quandl hasn't ingested data of the years 2018,2019 and 2020. Just by plotting a stock price you can see this.
AAPL stock 2016-2020:
Why would this happen? Quandl free data doesn't seem to have restrictions on recent data. I am newbie on this topis and on this tools and it is quite frustrating.
It is not uncommon for Quandl to stop updating free datasets, either because the underlying data source disappears or for some other reason. Their focus as a company is elsewhere (primarily on alternative data sold to institutions).
If you want to work with Zipline, your best bet is either to use Quantopian (which is free but does not support live trading) or QuantRocket (which has a free tier and supports live trading).