The twists and turns of the online brokerage's path to a public offering The brokerage app Robinhood has transformed retail trading. WSJ explains its rise amidst a series of legal investigations and regulatory challenges as it looks forward to its IPO. Photo illustration: Jacob Reynolds/WSJ WSJ Explains News moves fast, and there's not always time to untangle the complex forces driving the day's biggest stories. WSJ Explains breaks down big market moves, business and economic trends, and scientific developments to help you stay ahead of the curve. More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #WSJ #Robinhood #IPO