Zombie games take place in modern day-styled game worlds. Zombie outbreaks are normally the product of scientific experiments gone wrong. thinkorswim is an advanced platform—and so much more. It's your entry into a holistic trading experience brought to you by TD Ameritrade. All backed by constant innovation, all to help keep you on top of the market. With cream-of-the-crop tools and resources, you can place trades from your desktop. Get notifications on your mobile devices. Interact with traders in chat rooms. Even flip through thinkMoney® magazine for cool trading tips and more. thinkorswim by TD Ameritrade keeps you connected to the trading world so that you can spot potential trading opportunities—and act on them like never before. After all, there's a reason why StockBrokers.com ranked us #1 for Platforms & Tools.1 This hands-on companion to The Options Course, Second Edition includes a complete answer key and covers a wide range of stocks and options issues including: Trading Session The period during which the Exchange is open for trading.