This is what I call "Time to buy a stock" make a line on every red pick going down in the last 5 yrs and this will give you and idea where the stock are going. Also is so important to watch the news about the company because if you don't watch the news of the company you won't know when they will be involve in big problems and at that time is when almost everyone sell their stocks that means that the price of your investment will drop dramatically.