Crossovers
Normally, the faster
%Kline changes direction sooner than the %D line.
This means that the crossover will occur before the
%D line has reversed direction. When the %D line reverses direction
first, a slow, stable change of direction is indicated,
and %D is regarded as a more reliable signal.
Divergence Failure
An important
indication of a possible change in trend arises when the
%K line crosses the %D line, moves back to
test its extreme level, and fails to cross the %D
line.
Reverse Divergence
Occasionally,
during an uptrend, the %D line will make a lower
low, which is associated with a higher low in the price. This is a bearish omen, and
conventional wisdom suggests looking for a selling
opportunity on the next rally. This condition is
sometimes referred to as a bear setup. A bull
setup develops at the end of a downtrend.