I am really surprised to know that Quantopian does not support even paper trading anymore today.
If you are considering alternative solutions to run your Quantopian strategies on your own machine or a server in cloud, please try www.IBridgePy.com
Migration instruction is here
http://www.ibridgepy.com/tutorials/#Migrating_from_Quantopian_to_IBridgePy Also, IBridgePy starts to support backtest using IB's historical data and data from other data providers.
You may learn IBridgePy's backtest features on YouTube
DISCLAIMER: This is Dr. Hui Liu, the creator of IBridgePy