  Moving average crossovers  Let’s talk about the Golden Cross
and the Death Cross.  No, we’re not opening a deck of cards and
telling your fortune. These colorful terms refer to patterns you
probably use every day in your trading but don’t refer to by
these names. Along with their many cousins, they comprise a
whole division of technical analysis. You might know them better
as moving average crossovers.  Moving averages emit vital market
data, but all of them exhibit one common limitation: They lag
current events. By the time a 20-bar average curves upward to
confirm a trend, the move is already underway and may even be
over. While faster incarnations, such as exponential moving
averages, will speed up signals, all of them ring the trading
bell way too late.   Averages display all the common
characteristics of support/resistance. For example, one average
will often bounce off another one on a first test, rather than
break through right away. Then, like price bars, the odds shift
toward a violation and crosso