Frequency Analysis based on Monthly Comb
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Even a casual examination of historical price lines seems to reveal cycles or regular short term fluctuations that continue repeating. 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. The paradoxical condition of variable length periods forces the adoptation of some new forms of analysis. |
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Frequency from Monthly Comb Filter
Representative Cycle (Trading Sessions) = 18.00
Sawtooth = 51.35
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 16.68 | 26.00 | 16.00 | 13.18 % | | Low | 17.89 | 31.00 | 18.00 | 13.07 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Thursday, November 20, 2008 | 35.72 | 18 | | Monday, September 08, 2008 | 53.62 | | | 58 | | | Monday, October 27, 2008 | 37.53 | 28 | | Monday, June 16, 2008 | 57.08 | | | 23 | | | Wednesday, September 17, 2008 | 47.98 | 31 | | Tuesday, May 13, 2008 | 55.51 | | | 52 | | | Monday, August 04, 2008 | 47.70 | 40 | | Thursday, February 28, 2008 | 52.77 | | | 45 |
Fourier Transform after Digital Filter M | Cycle Length | Fourier Amplitude | | 9 | 0.55 | | 11 | 0.46 | | 20 | 0.38 | | 14 | 0.31 | | 26 | 0.29 | | 24 | 0.22 | | 30 | 0.17 | | 51 | 0.16 | | 35 | 0.14 | | 37 | 0.14 | | 40 | 0.12 |
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Frequency Analysis based on Quarterly Comb
Frequency from Quarterly Comb Filter
Representative Cycle (Trading Sessions) = 84.00
Sawtooth = 42.52
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 50.17 | 87.00 | 53.00 | 18.58 % | | Low | 51.00 | 84.00 | 50.00 | 16.51 % |
| Recent High | Price | Recent Low | Price | Cycle | | Monday, September 08, 2008 | 53.62 | | | 58 | | | Monday, August 04, 2008 | 47.70 | 95 | | Monday, June 16, 2008 | 57.08 | | | 75 | | | Wednesday, March 19, 2008 | 47.43 | 80 | | Thursday, February 28, 2008 | 52.77 | | | 97 | | | Wednesday, November 21, 2007 | 40.39 | 73 | | Tuesday, October 09, 2007 | 52.37 | | | 118 | | | Thursday, August 09, 2007 | 47.45 | 139 |
Fourier Transform after Digital Filter Q | Cycle Length | Fourier Amplitude | | 9 | 0.35 | | 14 | 0.19 | | 17 | 0.19 | | 20 | 0.17 | | 146 | 0.16 | | 26 | 0.16 | | 85 | 0.15 | | 64 | 0.14 | | 293 | 0.13 | | 30 | 0.13 | | 158 | 0.12 |
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Frequency Analysis based on Yearly Comb
Representative Cycle (Trading Sessions) = 0.00
Sawtooth = 53.31
| 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 | | Monday, June 16, 2008 | 57.08 | | | 290 | | | Wednesday, November 21, 2007 | 40.39 | 212 | | Monday, April 23, 2007 | 61.45 | | | 289 | | | Monday, January 22, 2007 | 48.00 | 153 | | | Monday, June 12, 2006 | 46.74 | 284 | | Monday, February 27, 2006 | 63.46 | | | 293 | | | Tuesday, April 26, 2005 | 46.85 | 640 | | Tuesday, December 28, 2004 | 60.76 | | | 246 |
Fourier Transform on Raw Closing Prices | Cycle Length | Fourier Amplitude | | 512 | 3.19 | | 341 | 3.15 | | 683 | 3.10 | | 293 | 2.66 | | 9 | 1.80 | | 228 | 1.66 | | 410 | 1.50 | | 158 | 1.35 | | 137 | 1.22 | | 14 | 1.19 | | 256 | 1.10 |
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| Breaking News: In the news, Friday, January 02, 2009: An unfavorable condition has developed with Comcast Corporation, ticker symbol CMCSA. Also, there are breaking events concerning Praxair, Inc. (PX) and Intel (INTC)
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Average Sawtooth based on Monthly Combo
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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. This is supposed to indicate the degree of fear or greed. 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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