I think most would agree that the primary market leaders of the current 7 year rally would be Google, Apple, Netflix, and Amazon. With a combined market cap of $1.4 Trillion, these four individual stocks have a significant influence on U.S. equity indices. When they are bid higher, they will drag markets up. When they sell off, well the opposite is true.
With all of this in mind, here are annotated weekly charts of our market leaders. Unless some other companies start stepping up, I'm not seeing how the bull market can continue. In fact, three of the four leaders are nearing major support on the charts with significant bearish consequences if support breaks down.