Lesson 5: Diagonal
Triangles
A diagonal triangle is a
motive pattern yet not an impulse, as it has one or two
corrective characteristics. Diagonal triangles substitute
for impulses at specific locations in the wave structure.
As with impulses, no reactionary subwave fully retraces
the preceding actionary subwave, and the third subwave is
never the shortest. However, diagonal triangles are the
only five-wave structures in the direction of the main
trend within which wave four almost always moves into the
price territory of (i.e., overlaps) wave one. On rare
occasions, a diagonal triangle may end in a truncation,
although in our experience such truncations occur only by
the slimmest of margins.
Ending Diagonal
An ending diagonal is a
special type of wave that occurs primarily in the fifth
wave position at times when the preceding move has gone
"too far too fast," as Elliott put it. A very
small percentage of ending diagonals appear in the C wave
position of A-B-C formations. In double or triple threes
(to be covered in Lesson 9), they appear only as the final
"C" wave. In all cases, they are found at
the termination points of larger patterns,
indicating exhaustion of the larger movement.
Ending diagonals take a
wedge shape within two converging lines, with each
subwave, including waves 1, 3 and 5, subdividing into a
"three," which is otherwise a corrective wave
phenomenon. The ending diagonal is illustrated in Figures
1-15 and 1-16 and shown in its typical position in larger
impulse waves.

Figure 1-15 |

Figure 1-16 |
We have
found one case in which the pattern's boundary lines diverged,
creating an expanding wedge rather than a contracting
one. However, it is unsatisfying analytically in that its
third wave was the shortest actionary wave, the entire
formation was larger than normal, and another
interpretation was possible, if not attractive.
For these reasons, we do not include it as a valid
variation.
Ending diagonals have
occurred recently in Minor degree as in early 1978, in
Minute degree as in February-March 1976, and in
Subminuette degree as in June 1976. Figures 1-17 and 1-18
show two of these periods, illustrating one upward and
one downward "real-life" formation. Figure 1-19
shows our real-life possible expanding diagonal triangle.
Notice that in each case, an important change of
direction followed.
Figure
1-17
Figure
1-18
Figure
1-19
Although not so
illustrated in Figures 1-15 and 1-16, fifth waves of
diagonal triangles often end in a "throw-over,"
i.e., a brief break of the trendline connecting the end
points of waves one and three. Figures 1-17 and 1-19 show
real life examples. While volume tends to diminish as a
diagonal triangle of small degree progresses, the pattern
always ends with a spike of relatively high volume when a
throw-over occurs. On rare occasions, the fifth subwave
will fall short of its resistance trendline.
A rising diagonal is
bearish and is usually followed by a sharp decline
retracing at least back to the level where it began. A
falling diagonal by the same token is bullish, usually
giving rise to an upward thrust.
Fifth wave extensions,
truncated fifths and ending diagonal triangles all imply
the same thing: dramatic reversal ahead. At some
turning points, two of these phenomena have
occurred together at different degrees, compounding the
violence of the next move in the opposite direction.
Leading Diagonal
When diagonal triangles
occur in the wave 5 or C position, they take the
3-3-3-3-3 shape that Elliott described. However, it has
recently come to light that a variation on this pattern
occasionally appears in the wave 1 position of impulses
and in the wave A position of zigzags. The characteristic
overlapping of waves 1 and 4 and the convergence of
boundary lines into a wedge shape remain as in the ending
diagonal triangle. However, the subdivisions are
different, tracing out a 5-3-5-3-5 pattern. The structure
of this formation (see Figure 1-20) fits the spirit of
the Wave Principle in that the five-wave subdivisions in
the direction of the larger trend communicate a
"continuation" message as opposed to the
"termination" implication of the three-wave
subdivisions in the ending diagonal. Analysts must be
aware of this pattern to avoid mistaking it for a far
more common development, a series of first and second
waves. The main key to recognizing this pattern is the
decided slowing of price change in the fifth subwave
relative to the third. By contrast, in developing first
and second waves, short term speed typically increases,
and breadth (i.e., the number of stocks or subindexes
participating) often expands.
Figure
1-20
Figure 1-21 shows a real
life example of a leading diagonal triangle. This pattern
was not originally discovered by R.N. Elliott but has
appeared enough times and over a long enough period that
we are convinced of its validity.
Figure
1-21
Next Lesson:
Zigzags
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