The Ultimate Oscillator
By Larry Williams
There is nothing more intriguing to the beginning commodity or stock
trader than the discovery of oscillators. At first, oscillators appear
to be the perfect trading tool because so often they give excellent buy
and sell signals. But, the more you use oscillators, the more you
realize that oscillators give an equal number of false signals.
Since the turn of the century, traders have tried to tame their
oscillators in order to develop a new approach that does not give false
signals or false divergences yet provides an insight into the market
that no other tool can.
An oscillator actually measures the momentum of data, whether it is
price, volume, or open interest. An oscillator will help show the speed
at which the information is changing. Thus, it can also define
over-bought or over-sold areas.
The pioneer in oscillator work was Owen Taylor who in the 1920's
presented oscillator work based on 7-day data. Taylor looked at price
today versus a 7-day moving average of price or a 7-day moving average
of advancing and declining stocks over the last seven days. In the
1940's Woods and Vignolia started their interesting approach to the
market measuring volume in what is now known as On Balance Volume. These
two gentlemen, based in San Francisco, started running a cumulative
positive-negative volume flow that was later popularized by Joe
Granville. Woods
and Vignolia also did a tremendous amount of oscillator work using 20 to
40-day measurements of days that had up volume versus days that had down
volume. Slightly earlier than this, the Lowry Reports out of Florida
were busy running moving averages on advancing and declining stock or
advancing and declining volume under their heading of "buying
pressure" and "selling pressure".
In the 1950's not too much was done in the way of oscillators. It wasn't
until 1960 that Security Market Research, a service out of Denver,
Colorado, showed an oscillator based on the difference between two
moving averages that the oscillator number crunchers started getting
busy again. The ability to construct oscillators improved substantially
with the advent of the computer and especially small personal computers.
That allowed the introduction of a new approach to oscillators going
beyond a
simple moving average. The new trading crowd had been to college, had
studied their math, and was suddenly flipping around words like
exponentials, supersonic averages, front-end-weighted moving
averages, lagged moving averages, rolling numbers, etc.
This all reached its zenith in what has become one of the most widely
known oscillators constructed by Wells Wilder: the Relative Strength
Index. In fact the index is not a measure of relative strength because
"relative" means "in relation to something." What Wilder created was an
oscillator based on a 14 day time cycle, an oscillator that has a decent
record of giving buy and sell signals in the market.
The Oscillator Opportunity
The reason people have continued dabbling with oscillators is that they
have the capability to give indications in advance of market turning
points. I wrote an article in 1973 for what was then known as
Commodities magazine (now Futures) that showed an approach to
oscillators in the pork belly and soybean oil market that actually led
major tops and bottoms in the market. The trouble for most oscillator
workers was, and has continued to be, that while frequently oscillators
lead sometimes they lead far too early and, instead of buying a bottom,
you are buying falling daggers
and getting sliced up. Even the best oscillators consistently give
premature buy and sell signals. I believe my "Ultimate Oscillator"
corrects this.
The Oscillator Problem
The largest failure of oscillators is their inability to deal correctly
with the time cycles involved. Let me explain that a bit. If you use a
7-day average, as Taylor did in the 1920's, you will quickly find that
the maximum move you are going to catch is one that lasts somewhere in
the area of 3 1/2 to 9 days. In other words, the type of moves the
oscillator catches cannot, by definition, be much longer than the time
period measured in the oscillator.
If you go out to a longer term approach—something that measures what is
taking place in sixty or seventy days—the problem is that by the time
your oscillator's identified the trend, the trend then reverses. Markets
are so quick that anything using 30, 50, or 80 days does not respond
quickly enough to get you in and out with profit. One thing I noticed
through the years is that the traditional short term oscillators, such
as those featured
in most chart books, will turn very positive at the start of a major
up-move in the market but quickly show divergence and overbought
readings, causing most traders to sell short somewhere after the first
leg of a
bull market. They then take a short position on the market and hold that
short position in one form or another, actual outright short or afraid
to purchase, for the next three or four legs of the bull market. That
can be a costly experience. This happens because the time measurements
in the oscillators they are following are too short-term in nature to
catch a major move.
All About the Ultimate Oscillator
What is really needed is an oscillator that expands as the market gets
stronger or weaker. As an example, if the market shows a tremendous
amount of strength your oscillator would expand the time base, thereby
not allowing the short term fluctuation to influence the fact that the
market has turned the corner on a long-term basis. To capture this
effect, I have included in the ultimate oscillator three different time
cycles in the
marketplace. Additionally, instead of measuring price, I believe it is
more profitable to measure the amount of accumulation and distribution
taking place in the market.
It Is About Time
Time is one of the most critical elements in creating your oscillator. I
have chosen three different time periods for the oscillator, three time
cycles that generally have been the most dominant time cycles in the
market. I use one which is based on 7, 14 and 28-day measurements of accumulation and distribution. I have found that those time periods are
generally the ones that give the moves most traders wish to trade.
The Great Equalizer
One needs to equalize these time periods. To do this, we will multiply
the data we get from the seven day time series by 4 and multiply the
data arrived at from the 14 day time period by 2, thus having equal
values for all three cycles.
Measuring Accumulation and Distribution
I have tried to measure accumulation and distribution in commodities in
terms of volume, in terms of open interest and in terms of net change,
in terms of volatility factors, in terms of tick by tick trade, you name
it. The bottom line of all that effort is that what appears to be the
easiest way of measuring accumulation and distribution is to simply
define selling pressure as the price movement from the high to the close
each day while taking the buying measurement to be the difference
between the low and the close. For this study, one must also incorporate
the previous day's closing price if the following day's high is lower
than the previous day's closing price or the following day's low is
higher than the closing price. In
short, then one must fill in the gaps that occur between yesterday's
price and today's high or low. As an example, if yesterday's closing
price was 60 and this morning's low was 61 with a close today of 63, the
measure of buying would not be 63 minus 61 but 63 minus 60 or 3 cents of
buying.
Constructing the Oscillator
You need to set up several columns. First, I always post the high, low,
and close each day. In one column to the right I have the buying units
for that day, defined as the close minus the true low. I then skip a
couple of columns and have another column to record the total activity
of the day. We would define that by subtracting the true high from the
true low. We have then created on a daily basis the amount of buying for
the day and the total amount of activity (buying and selling) for the
day. I next run a 7-day sum of the total amount of buying for the last
seven days. I also run a 14-day sum of the buying figure and finally a
28-day sum. I then do the same thing with the total activity or range
figure by running 7, 14, and 28-day sums of the range. Now the fun
begins. I then divide the 7-day figure of the range into the 7-day
figure of buying, giving the percent of buying in that time period. I
next divide the total range of the 14 days into the buying of the 14
days to give me a percent of buying for the 14 days. I follow up with
the third step of dividing the total range for the last 28 days into the
total buying for the 28 days, giving me a percentage of buying during
that time period. Finally I multiply the 7 day figure by 4 and the
14-day figure by 2 to equalize the impact that each time period will
have.
If you have followed along with me so far, you now realize that I add
the final 7, 14, and 28-day figures into one master percentage figure
that reflects the buying pressures and, concomitantly, the selling, of
three time periods over the last 28 days, all equalized to give each
time period an equal impact. This data is then plotted as a percentage
change underneath price action resulting in the Ultimate Oscillator.
Rules for Using the Ultimate Oscillator
There will be two requirements for a buy and sell signal to activate a
market position using the oscillator. Our first demand is that we have a
price divergence from the oscillator. In the case of a buy we must have
had a lower low in price that was not matched by a lower low in the
oscillator. In the case of a sell we must have had a higher high in
price that was not matched by the oscillator. Secondly, await a trend
break

CHART 1
in the Ultimate Oscillator to produce the actual signal. Once the
divergence for a sell signal has occurred, note the low in the
oscillator (Chart 1) prior to the peak that set up the divergence. I
have marked this as A on the February 1984 Belly chart. Once the
Ultimate Oscillator falls below this low, you can take a short position
in the market. The failure in the oscillator is your indication that it
is time to sell. Frequently you will see this taking place right at or
very close to the actual high in price. After the divergence for a buy
signal has occurred note the high in the oscillator prior to the low
that set up the divergence. I have marked this as B on the February 1984
Belly chart. Once the Ultimate Oscillator rises above this peak you take
a long position. The trend break in the oscillator is your indication
that buyers now dominate and an up move will begin. Again, note how
close this trend break to the upside occurs in the daily price lows.
Once you have entered a position, you will exit in one of the three
following manners:
If Short
1. Exit on an opposite signal occurring. You would also be reversing to
the long side.
2. Go flat, not reversing, when the Ultimate Oscillator falls to 30% or
less. This signal will be early at times but its usage will greatly
increase your percent of winners and reduce your number of sleepless
nights.
3. Once short, close our your position by going flat any time the index
rises above 65%,. This is your initial stop loss.
If Long
1. Exit on an opposite signal occurring. You would also be reversing to
the short side.
2. Go flat, not reversing, when the Ultimate Oscillator rises above 70%.
Comments in #2 above apply.
3. Once long, close out your position going flat any time the index
falls below 45% after having risen
above 50%. This is your stop loss.
All divergence signals must first have seen the index rise above 50%
for sell and fallen below 30% for a buy. Divergent patterns that occur
without the index first going to these levels are not to be acted upon.
About the author: Larry Williams has been entrenched in the
financial markets for over 40 years. His most notable
accomplishment is the creation of the williams %R indicator. However,
throughout the last 40 years Williams has developed other tools that are
widely used throughout the industry. Other achievements include the
pivot point, the williams accumulation/distribution indicator, the
shadow technique for moving averages, momentum studies, the 4-year
master stock market pattern and numerous trading concepts that are
widely accepted in today's trading standards. Williams has written
numerous books on trading the market, teaches at seminars and provides
consulting for trading sites such as www.marketclub.com.
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