<prompt> Human: Almost every expert of the stock market says sell your stocks when the stock prices are high and the demand is high, and buy when the stock prices are low and the demand is low. Now heres my question: How can we know that the stock prices are high enough to sell, or low enough to buy? the prices can always climb up after i sell, and the other way around as well..  <response>: We cant. Even most experts cant.Dont even try. Put money into broad index funds, and leave the gambling to the pros. 