Here is another example of a simple symmetry setup. The definition of symmetry is similarity or equality when comparing market swings in the same direction.
This time in AMZN, a simple projection of a prior rally swing of $211.39 gave us the area of 3337.48 to watch for a possible failure to the downside and sell entry. Note that the two swings up were very similar at $211.39 vs $211.47.
So far we've seen a downside move of $141.55 off of symmetry resistance. At this point we would be trailing down stops on the shorts.