Welcome to the Quantopian Retro, a short series of interviews of Quantopian teammates, community members, and outside quants/experts. The goal of the series is to look back on Quantopian and reflect on what went right, what went wrong, and what we can learn from it all. This episode is with Dan Whitnable, erstwhile head of community at Quantopian. Dan was an engineer and started using Quantopian for his own trading. Over time, he became a major contributor to the Quantopian user forums and eventually joined Quantopian to work with the community full time. Dan has a unique mix of internal and external perspectives on Quantopian. I hope everyone enjoys his insights as much as I did. Have questions or ideas about the retro? Someone you want me to interview? Drop me a line via feedback at quantopian, or make a comment.thanks,fawce Disclaimer Quantopian provides this presentation to help people write trading algorithms - it is not intended to provide investment advice. More specifically, the material is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory or other services by Quantopian. In addition, the content neither constitutes investment advice nor offers any opinion with respect to the suitability of any security or any specific investment. Quantopian makes no guarantees as to accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.