Opendoor has skyrocketed more than 700% since Eric Jackson first tweeted about it this summer and he says the rally may just be getting started. In this episode of In the Money with Amber Kanwar, the Canadian hedge fund manager returns to explain how he went from an Opendoor skeptic in January to leading a retail “Open Army” that helped drive sweeping management changes, brought the founders back to the board, and turned the stock into his next Carvana-style bet.