Some things I've learned about market traders in general are that both the Bulls and the Bears get fed but the Hogs usually go hungry in the end.
If I wait to sale only on the top or hold out to buy only on the bottom I become a spectator and not a player. I minimise both my risk and my potential for reward.
I must be willing to take positions at price points between these extremes. Let's think of the market like a face on a clock with the market bottom at 6 and the top at 12. If we are buying from 3 to 9 and selling from 9 to 3 chances are we will do better than average. The greater the risk the greater the reward factor would hopefully be.
If I stay active throughout the market and at all levels I may very well have a chance to be in a position to trade at a bottom or a top by the actions I have taken.
Remember there are still 56 shopping days remaining before Christmas giving us plenty of time to pop some more popcorn and enjoy this show unfold.