Noises are created by institution investors who manipulate the stock price. Stick with fundamentals. Buy when the fundamentals are good and vice versa.
I wrote the book Scoring Stocks, Apple scored very high ( IBM, my first
candidate for the example used in the book, scored very low) and I
recommended Apple in May, 2013 (the publish date of the book) when
almost all institution investors dumping it. The rest is history.
I recommended to sell it in my blog in Feb. 2015 when Apple was over
132 (should have shorted it). I bought it very recently when
fundamentals improved and sold it last week for more than 10% quick
gain. I am not a trader but just a guy who wants to make money whether I
have to wait long or short.