Sometimes the most important signals in the market come in small almost undetectable ways. They're easily missed. Well by most people, that is, not by Cramer.
Cramer thinks that may be the case with Alcoa earnings, which admittedly were cheered by the Street, though nothing more than that.
Dig down, however, and Cramer thinks there's a reason to celebrate – there may even be a reason to throw a big party with confetti and a tiered cake.
Hidden beneath the headlines, he says is an important data point which may be extremely bullish.
Alcoa sees demand for aluminum growing 7 percent in 2013, up from a 6 percent gain in 2012.