S&P 500 Marks Another Underwhelming Bullish Break – What Does It Mean?

From a trader’s perspective, what should be interpreted from a market that earns a technical break but then fails to generate the follow through that such a move would suggest? The S&P 500 has definitively cleared 4,000 but there was no follow through this past session. Can MSFT earnings or the forthcoming US GDP change the tempo?