Learn what the relative strength index (RSI) is, how it works, and how to read overbought and oversold signals, along with the formula behind this popular indicator.

Learn how to measure the magnitude of price changes in 11 minutes Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market Technician (CMT). Investopedia / ...

Forbes contributors publish independent expert analyses and insights. John Navin is a Colorado-based journalist who writes about stocks. The S&P 500 on Friday hit another new high – it was brief as ...