Rinse Lather Repeat or Rinse completely

SPX has made a similar pattern during the week. It is clearly in a channel and the profitable trade has been shorting the top and buying the bottom. Will this pattern work again today.

The key levels to watch are :
934-930 support bottom of the channel
960 top of channel

If 930 breaks 920 is the next support this may provide an area for the market to bounce.