Frequency Analysis based on Monthly Comb
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Short term fluctuations that seem to repeat with a regular frequency are often (even generally) seen in stock price charts. Through the years, technicians have expended much effort to measure and exploit these cycles. It would appear simple enough to do a frequency analysis on the time series. But the cycles or periods that seem so easy to see in the price data, have proven to be surprisingly difficult to measure by classical methods. The classical methods apply to stationary cycles of exactly regular period. We can easily remove the trends from historical price data to make the series stationary. However, attempts to exploit the market cycles are foiled by the deviation from strictly periodic behavior required by ordinary analysis. One factor in the behaviour of market fluctuations is "Anticipation". When speculators detect a cycle in prices, they will buy earlier before the peak, and sell earlier before the dip. This phenomena causes an increase in frequency, and eventually a breakup of the established cycle. Traditional frequency analysis methods such as the Fourier Transform, break down badly attempting to deal with these irregularities. Wilder estimated that there was an important period of about 28 trading sessions. The half cycle of this period (14 sessions) is a default factor in many of the technical indicators. We have found this to be a reasonable figure, even in today's markets, but there is significant variation between issues. Some companies just seem to have faster or slower cycles for one reason or another, and the indicators may be more accurate when fitted to the situation. New methods had to be invented to deal with the seeming mathematical absurdity in the notion of non-periodic cycles. |
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Frequency from Monthly Comb Filter
Representative Cycle (Trading Sessions) = 27.00
Sawtooth = 54.42
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 16.38 | 27.00 | 14.00 | 11.56 % | | Low | 16.50 | 27.00 | 27.00 | 10.91 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Wednesday, August 25, 2010 | 36.80 | 25 | | Monday, August 02, 2010 | 39.36 | | | 33 | | | Wednesday, July 21, 2010 | 34.98 | 29 | | Tuesday, June 15, 2010 | 39.53 | | | 30 | | | Wednesday, June 09, 2010 | 35.84 | 22 | | Monday, May 03, 2010 | 39.36 | | | 49 | | | Friday, May 07, 2010 | 35.25 | 60 | | Monday, February 22, 2010 | 32.09 | | | 29 |
Fourier Transform after Digital Filter M | Cycle Length | Fourier Amplitude | | 20 | 0.28 | | 14 | 0.28 | | 12 | 0.27 | | 26 | 0.22 | | 45 | 0.21 | | 22 | 0.20 | | 16 | 0.18 | | 18 | 0.17 | | 85 | 0.17 | | 57 | 0.16 | | 128 | 0.16 |
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Frequency Analysis based on Quarterly Comb
Frequency from Quarterly Comb Filter
Representative Cycle (Trading Sessions) = 0.00
Sawtooth = 49.64
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 60.00 | 136.00 | 0.00 | 8.27 % | | Low | 53.50 | 71.00 | 0.00 | 10.73 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Wednesday, July 21, 2010 | 34.98 | 111 | | Tuesday, June 15, 2010 | 39.53 | | | 108 | | | Wednesday, February 10, 2010 | 27.88 | 68 | | Friday, January 08, 2010 | 32.78 | | | 252 | | | Monday, November 02, 2009 | 27.28 | 177 | | Thursday, January 08, 2009 | 15.08 | | | 168 | | | Friday, February 20, 2009 | 12.68 | 80 | | Friday, May 09, 2008 | 26.53 | | | 149 |
Fourier Transform after Digital Filter Q | Cycle Length | Fourier Amplitude | | 128 | 0.28 | | 85 | 0.22 | | 171 | 0.21 | | 256 | 0.18 | | 146 | 0.15 | | 57 | 0.15 | | 93 | 0.15 | | 12 | 0.15 | | 20 | 0.15 | | 512 | 0.13 | | 14 | 0.12 |
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Frequency Analysis based on Yearly Comb
Representative Cycle (Trading Sessions) = 0.00
Sawtooth = 0.00
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 0.00 | 0.00 | 0.00 | 0.00 % | | Low | 0.00 | 0.00 | 0.00 | 0.00 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Friday, October 24, 2008 | 10.27 | 557 | | Friday, October 05, 2007 | 29.24 | | | 567 | | | Wednesday, August 09, 2006 | 13.25 | 276 | | Monday, January 01, 0001 | 0.00 | | | 0 | | | Monday, January 01, 0001 | 0.00 | 0 | | Monday, January 01, 0001 | 0.00 | | | 0 | | | Monday, January 01, 0001 | 0.00 | 0 | | Monday, January 01, 0001 | 0.00 | | | 0 |
Fourier Transform on Raw Closing Prices | Cycle Length | Fourier Amplitude | | 512 | 6.56 | | 256 | 3.55 | | 341 | 2.37 | | 205 | 1.56 | | 171 | 1.54 | | 146 | 1.48 | | 85 | 1.40 | | 114 | 1.31 | | 102 | 1.12 | | 93 | 1.11 | | 68 | 1.01 |
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| Breaking News: Friday, November 12, 2010: We have news on Cree, Inc., ticker symbol CREE. Signs of an over-bought condition have become noticable.
Also, there are breaking events concerning Intel and PetSmart, Inc.
From the News Archive: (11/11/2010 ) Favorable events happened at Exxon Mobil, Ingersoll-Rand Company Limited, and Concur Technologies, Inc.. Meanwhile, bad news came from International Game Technology.
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| DISCA
Discovery Communications, Inc
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Average Sawtooth based on Monthly Combo
| DISCA
Discovery Communications, Inc
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Average Sawtooth based on Bi-weekly Combo
A comparison of the average distance (in time) from each periodic high to to next periodic low, against the distance to the following high point, yields the Sawtooth Statistic. The mid-point, corresponding to a perfect sine wave, is 50 percent. Values less than this indicate the sell slope is steeper than the buy slope, while values over 50 percent show the opposite. The Sawtooth Statistic gives a clue to the general mood of the markets, functioning as a sort of sentiment indicator. The chart represents the sawtooth percentage of (approximately) monthly cycles over the past year, and of the (approximately) bi-weekly cycles, averaged over the past six months.
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