Frequency Analysis based on Monthly Comb
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It is obvious from inspection of price lines, that many seem to contain cycles that may persist in repeating for a long time. 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) = 21.00
Sawtooth = 50.56
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 17.10 | 29.00 | 21.00 | 13.38 % | | Low | 16.64 | 33.00 | 22.00 | 7.43 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Friday, September 10, 2010 | 43.77 | 15 | | Thursday, September 09, 2010 | 47.76 | | | 58 | | | Thursday, August 19, 2010 | 44.65 | 33 | | Thursday, June 17, 2010 | 42.35 | | | 30 | | | Friday, July 02, 2010 | 40.33 | 17 | | Wednesday, May 05, 2010 | 43.56 | | | 21 | | | Wednesday, June 09, 2010 | 39.17 | 80 | | Tuesday, April 06, 2010 | 42.27 | | | 53 |
Fourier Transform after Digital Filter M | Cycle Length | Fourier Amplitude | | 18 | 0.41 | | 15 | 0.40 | | 20 | 0.33 | | 25 | 0.26 | | 29 | 0.23 | | 37 | 0.19 | | 32 | 0.19 | | 34 | 0.18 | | 41 | 0.16 | | 51 | 0.13 | | 47 | 0.13 |
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Frequency Analysis based on Quarterly Comb
Frequency from Quarterly Comb Filter
Representative Cycle (Trading Sessions) = 80.00
Sawtooth = 41.17
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 48.38 | 103.00 | 58.00 | 35.51 % | | Low | 52.06 | 91.00 | 60.00 | 29.37 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Friday, September 10, 2010 | 43.77 | 65 | | Thursday, September 09, 2010 | 47.76 | | | 88 | | | Wednesday, June 09, 2010 | 39.17 | 80 | | Wednesday, May 05, 2010 | 43.56 | | | 74 | | | Friday, February 12, 2010 | 39.75 | 184 | | Tuesday, January 19, 2010 | 44.18 | | | 205 | | | Thursday, May 21, 2009 | 32.73 | 62 | | Thursday, March 26, 2009 | 37.59 | | | 35 |
Fourier Transform after Digital Filter Q | Cycle Length | Fourier Amplitude | | 91 | 0.21 | | 16 | 0.21 | | 18 | 0.20 | | 171 | 0.18 | | 20 | 0.17 | | 23 | 0.17 | | 27 | 0.16 | | 55 | 0.15 | | 82 | 0.15 | | 34 | 0.14 | | 87 | 0.14 |
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Frequency Analysis based on Yearly Comb
Representative Cycle (Trading Sessions) = 0.00
Sawtooth = 39.08
| 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 | | Tuesday, January 19, 2010 | 44.18 | | | 343 | | | Friday, October 10, 2008 | 27.35 | 143 | | Monday, September 08, 2008 | 38.87 | | | 346 | | | Wednesday, March 19, 2008 | 32.73 | 586 | | Wednesday, April 25, 2007 | 45.46 | | | 1249 | | | Wednesday, November 16, 2005 | 28.91 | 778 | | | Wednesday, October 16, 2002 | 6.65 | 380 | | Wednesday, May 08, 2002 | 19.22 | | | 412 |
Fourier Transform on Raw Closing Prices | Cycle Length | Fourier Amplitude | | 683 | 3.02 | | 410 | 2.54 | | 819 | 2.22 | | 512 | 1.85 | | 585 | 1.76 | | 341 | 1.55 | | 315 | 1.42 | | 14 | 1.02 | | 178 | 1.02 | | 273 | 1.00 | | 228 | 0.96 |
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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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PG&E Corporation
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Average Sawtooth based on Monthly Combo
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PG&E Corporation
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Average Sawtooth based on Bi-weekly Combo
Comparing the length of time from high points to successive lowpoints, against the corresponding time span from the lows to the following periodic highs, gives us the Sawtooth Indicator. 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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