Do you utilize technical indicators such as MACD and Onset Trend Detector in your analysis of the stock market? Stock Investing 101 explains how to use these indicators to potentially determine an interim high of the uptrend in the S&P 500 and why buying put options may make sense in some instances.  We describe what to looks for in order to determine a potential bottom in the market. By understanding how the stock market works, investors may better protect themselves from stock market declines..