Gotta give some real credit to James Wang https://www.quantopian.com/posts/trade-xiv-based-on-vix-1 and Anthony Garner and others.
This is the current version of Robin Hood Extreme Vetting https://www.quantopian.com/posts/robin-hood-extreme-vetting
There are alleged "risk-reducing" bits of code in this version. According to back test results, the more you "reduce risk" the less profits are made. Keep in mind I have lost multiple thousands of dollars live trading my algorithms. It seems like I learn more about real world behavior by live trading. I back test a lot first of course.
Pre warning: Don't follow me over a cliff, just because I so exuberantly jump!
I am all in UVXY right now including Robin Hood Gold.
This version can be adjusted to your risk tolerance including adding your own basket of ETFs / stocks as a set aside percentage of portfolio.
It, by default, eases into XIV and UVXY positions. That of course, according to back tests, greatly reduces profits.