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. 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) = 30.00
Sawtooth = 47.85
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 16.74 | 31.00 | 30.00 | 19.03 % | | Low | 16.41 | 30.00 | 16.00 | 15.95 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Tuesday, October 19, 2010 | 63.68 | 34 | | Tuesday, October 12, 2010 | 66.67 | | | 12 | | Friday, September 24, 2010 | 66.64 | | | 30 | | | Tuesday, August 31, 2010 | 57.01 | 29 | | Thursday, August 12, 2010 | 59.15 | | | 41 | | | Wednesday, July 21, 2010 | 55.06 | 31 | | Tuesday, June 15, 2010 | 60.11 | | | 23 | | | Monday, June 07, 2010 | 55.76 | 102 |
Fourier Transform after Digital Filter M | Cycle Length | Fourier Amplitude | | 15 | 0.46 | | 20 | 0.41 | | 18 | 0.38 | | 23 | 0.35 | | 29 | 0.28 | | 27 | 0.27 | | 31 | 0.22 | | 51 | 0.18 | | 34 | 0.17 | | 36 | 0.16 | | 39 | 0.14 |
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Frequency Analysis based on Quarterly Comb
Frequency from Quarterly Comb Filter
Representative Cycle (Trading Sessions) = 85.00
Sawtooth = 55.07
| Peak Type | Avg. Cycle | Median Cycle | Cycle Mode | Cycle Amplitude | | High | 46.00 | 96.00 | 38.00 | 25.31 % | | Low | 46.29 | 98.00 | 85.00 | 18.47 % |
| Recent High | Price | Recent Low | Price | Cycle | | | Wednesday, July 21, 2010 | 55.06 | 133 | | Wednesday, May 12, 2010 | 64.21 | | | 413 | | | Friday, January 08, 2010 | 37.65 | 104 | | Friday, September 19, 2008 | 39.16 | | | 42 | | | Tuesday, August 11, 2009 | 26.32 | 113 | | Tuesday, July 22, 2008 | 36.17 | | | 55 | | | Monday, March 02, 2009 | 18.72 | 85 | | Friday, May 02, 2008 | 41.68 | | | 88 |
Fourier Transform after Digital Filter Q | Cycle Length | Fourier Amplitude | | 13 | 0.28 | | 15 | 0.24 | | 20 | 0.23 | | 17 | 0.20 | | 23 | 0.20 | | 132 | 0.20 | | 117 | 0.17 | | 164 | 0.17 | | 141 | 0.16 | | 29 | 0.16 | | 100 | 0.15 |
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Frequency Analysis based on Yearly Comb
Representative Cycle (Trading Sessions) = 0.00
Sawtooth = 79.02
| 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, March 02, 2009 | 18.72 | 840 | | Friday, May 02, 2008 | 41.68 | | | 1011 | | | Wednesday, October 26, 2005 | 12.36 | 814 | | Tuesday, April 27, 2004 | 21.98 | | | 200 | | Friday, July 11, 2003 | 15.47 | | | 274 | | | Monday, August 05, 2002 | 8.89 | 563 | | Monday, June 10, 2002 | 13.79 | | | 195 | | | Thursday, April 27, 2000 | 4.84 | 271 |
Fourier Transform on Raw Closing Prices | Cycle Length | Fourier Amplitude | | 512 | 4.11 | | 455 | 3.71 | | 683 | 3.53 | | 585 | 3.42 | | 819 | 3.23 | | 9 | 2.21 | | 410 | 1.67 | | 372 | 1.54 | | 14 | 1.37 | | 228 | 1.28 | | 315 | 1.27 |
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| Breaking News: In the news, Monday, November 15, 2010: A favorable condition has developed with Sprint Nextel Corporation, ticker symbol S. Also, there are breaking events concerning Abbott Laboratories (ABT) and Cree, Inc. (CREE)
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Perrigo Company
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Average Sawtooth based on Monthly Combo
| PRGO
Perrigo Company
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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. Bullish or bearish moods may be reflected in the steepness of the buying and selling slopes, particularly as they change through time. 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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