An island top or bottom is formed when price
gaps in the direction of the current trend, and then it gaps the
opposite direction in the next day or so. One look at this
formation tells us where the name island comes from - they are
isolated from the previous and current trend by the gaps.
Regardless of the market factors that created this rare
formation, they are usually fair warning of a dramatic reversal.
AOC shows a good example of an Island Top.
Many people tend to think of islands as only one bar, but this
will cause you to miss opportunities by ignoring the fact that
Island Reversal Formations can take a few bars to fulfil their
promise.
ATML gives us another example of an Island
Top. As with almost any chart pattern, it is best to wait for a
confirmation move after the initial setup. This chart is a good
example that there is still plenty of "meat on the bone" after
waiting for a confirmation move.
Island Tops and Bottoms are reliant upon gaps,
and an exhaustion gap and breakaway gap are components of this
chart pattern. So Island Reversals actually give us two
confirming chart patterns. Once the trend line is broken after
the reversal, we are looking at a prime trade candidate.