Bollinger Bands are a technical indicator that help investors define trends and determine if a stock is overextended and might reverse. Bollinger Bands can also help investors identify and time potential entries and exits.Subscribe: http://bit.ly/SubscribeTDAmeritrade TD Ameritrade is where smart investors get smarter. We post educational videos that bring investing and finance topics back down to earth weekly. Have a question or topic suggestion? Let us know. Connect with TD Ameritrade:Facebook: http://bit.ly/TDAmeritradeFacebook Twitter: http://bit.ly/TwitterTDAmeritrade