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Fourier Analysis of ELRN (GREENWOOD HALL INC)


ELRN (GREENWOOD HALL INC) appears to have interesting cyclic behaviour every 12 weeks (.2498*sine), 14 weeks (.2258*sine), and 13 weeks (.1541*sine).

ELRN (GREENWOOD HALL INC) has an average price of .62 (topmost row, frequency = 0).



Click on the checkboxes shown on the right to see how the various frequencies contribute to the graph. Look for large magnitude coefficients (sine or cosine), as these are associated with frequencies which contribute most to the associated stock plot. If you find a large magnitude coefficient which dramatically changes the graph, look at the associated "Period" in weeks, as you may have found a significant recurring cycle for the stock of interest.

Right click on the graph above to see the menu of operations (download, full screen, etc.)

Fourier Analysis

Using data from 7/31/2014 to 3/20/2017 for ELRN (GREENWOOD HALL INC), this program was able to calculate the following Fourier Series:
Sequence #Cosine Coefficients Sine Coefficients FrequenciesPeriod
0.62085   0 
1.31631 .56808 (1*2π)/139139 weeks
2.33599 .11626 (2*2π)/13970 weeks
3.32733 .41607 (3*2π)/13946 weeks
4.11348 .24149 (4*2π)/13935 weeks
5.1298 .31585 (5*2π)/13928 weeks
6.014 .14437 (6*2π)/13923 weeks
7.15945 .17715 (7*2π)/13920 weeks
8.04627 .18129 (8*2π)/13917 weeks
9.13715 .16062 (9*2π)/13915 weeks
10.03643 .22576 (10*2π)/13914 weeks
11.06921 .15408 (11*2π)/13913 weeks
12.00438 .24982 (12*2π)/13912 weeks
13-.0355 .1219 (13*2π)/13911 weeks
14.001 .15783 (14*2π)/13910 weeks
15-.03305 .1016 (15*2π)/1399 weeks
16.03144 .1274 (16*2π)/1399 weeks
17-.02781 .14459 (17*2π)/1398 weeks
18-.01193 .13377 (18*2π)/1398 weeks
19-.06324 .14744 (19*2π)/1397 weeks
20-.06844 .10271 (20*2π)/1397 weeks
21-.07849 .1083 (21*2π)/1397 weeks
22-.08377 .0575 (22*2π)/1396 weeks
23-.05954 .06467 (23*2π)/1396 weeks
24-.08276 .04686 (24*2π)/1396 weeks
25-.05392 .0601 (25*2π)/1396 weeks
26-.10705 .04832 (26*2π)/1395 weeks
27-.07712 .00602 (27*2π)/1395 weeks
28-.0958 .01161 (28*2π)/1395 weeks
29-.06105 -.03696 (29*2π)/1395 weeks
30-.05644 -.00669 (30*2π)/1395 weeks
31-.0503 -.04659 (31*2π)/1394 weeks
32-.02528 -.01087 (32*2π)/1394 weeks
33-.04563 -.03979 (33*2π)/1394 weeks
34-.01564 -.02 (34*2π)/1394 weeks
35-.048 -.0339 (35*2π)/1394 weeks
36-.00773 -.04941 (36*2π)/1394 weeks
37-.02138 -.03927 (37*2π)/1394 weeks
38.00481 -.05714 (38*2π)/1394 weeks
39.0032 -.03215 (39*2π)/1394 weeks
40.00567 -.05424 (40*2π)/1393 weeks
41.01801 -.03258 (41*2π)/1393 weeks
42.00763 -.04019 (42*2π)/1393 weeks
43.02613 -.04008 (43*2π)/1393 weeks
44.01359 -.03956 (44*2π)/1393 weeks
45.04056 -.0503 (45*2π)/1393 weeks
46.04223 -.03117 (46*2π)/1393 weeks
47.05153 -.03129 (47*2π)/1393 weeks
48.04518 -.00879 (48*2π)/1393 weeks
49.03965 -.01488 (49*2π)/1393 weeks
50.03774 -.00975 (50*2π)/1393 weeks
51.03371 -.01348 (51*2π)/1393 weeks
52.03959 -.0065 (52*2π)/1393 weeks
53.03556 -.01391 (53*2π)/1393 weeks
54.04833 -.00739 (54*2π)/1393 weeks
55.03721 .0043 (55*2π)/1393 weeks
56.03779 -.00083 (56*2π)/1392 weeks
57.0249 .00544 (57*2π)/1392 weeks
58.02843 -.01336 (58*2π)/1392 weeks
59.03847 .0021 (59*2π)/1392 weeks
60.03259 -.01201 (60*2π)/1392 weeks
61.04324 .00357 (61*2π)/1392 weeks
62.0315 -.00069 (62*2π)/1392 weeks
63.04653 .007 (63*2π)/1392 weeks
64.02036 .01089 (64*2π)/1392 weeks
65.03415 .00431 (65*2π)/1392 weeks
66.01581 .00953 (66*2π)/1392 weeks
67.03239 -.01001 (67*2π)/1392 weeks
68.02252 .01119 (68*2π)/1392 weeks
69.02778 -.00745 (69*2π)/1392 weeks
70.02778 .00745 (70*2π)/1392 weeks
71.02252 -.01119 (71*2π)/1392 weeks
72.03239 .01001 (72*2π)/1392 weeks
73.01581 -.00953 (73*2π)/1392 weeks
74.03415 -.00431 (74*2π)/1392 weeks
75.02036 -.01089 (75*2π)/1392 weeks
76.04653 -.007 (76*2π)/1392 weeks
77.0315 .00069 (77*2π)/1392 weeks
78.04324 -.00357 (78*2π)/1392 weeks
79.03259 .01201 (79*2π)/1392 weeks
80.03847 -.0021 (80*2π)/1392 weeks
81.02843 .01336 (81*2π)/1392 weeks
82.0249 -.00544 (82*2π)/1392 weeks
83.03779 .00083 (83*2π)/1392 weeks
84.03721 -.0043 (84*2π)/1392 weeks
85.04833 .00739 (85*2π)/1392 weeks
86.03556 .01391 (86*2π)/1392 weeks
87.03959 .0065 (87*2π)/1392 weeks
88.03371 .01348 (88*2π)/1392 weeks
89.03774 .00975 (89*2π)/1392 weeks
90.03965 .01488 (90*2π)/1392 weeks
91.04518 .00879 (91*2π)/1392 weeks
92.05153 .03129 (92*2π)/1392 weeks
93.04223 .03117 (93*2π)/1391 weeks
94.04056 .0503 (94*2π)/1391 weeks
95.01359 .03956 (95*2π)/1391 weeks
96.02613 .04008 (96*2π)/1391 weeks
97.00763 .04019 (97*2π)/1391 weeks
98.01801 .03258 (98*2π)/1391 weeks
99.00567 .05424 (99*2π)/1391 weeks
100.0032 .03215 (100*2π)/1391 weeks
101.00481 .05714 (101*2π)/1391 weeks
102-.02138 .03927 (102*2π)/1391 weeks
103-.00773 .04941 (103*2π)/1391 weeks
104-.048 .0339 (104*2π)/1391 weeks
105-.01564 .02 (105*2π)/1391 weeks
106-.04563 .03979 (106*2π)/1391 weeks
107-.02528 .01087 (107*2π)/1391 weeks
108-.0503 .04659 (108*2π)/1391 weeks
109-.05644 .00669 (109*2π)/1391 weeks
110-.06105 .03696 (110*2π)/1391 weeks
111-.0958 -.01161 (111*2π)/1391 weeks
112-.07712 -.00602 (112*2π)/1391 weeks
113-.10705 -.04832 (113*2π)/1391 weeks
114-.05392 -.0601 (114*2π)/1391 weeks
115-.08276 -.04686 (115*2π)/1391 weeks
116-.05954 -.06467 (116*2π)/1391 weeks
117-.08377 -.0575 (117*2π)/1391 weeks
118-.07849 -.1083 (118*2π)/1391 weeks
119-.06844 -.10271 (119*2π)/1391 weeks
120-.06324 -.14744 (120*2π)/1391 weeks
121-.01193 -.13377 (121*2π)/1391 weeks
122-.02781 -.14459 (122*2π)/1391 weeks
123.03144 -.1274 (123*2π)/1391 weeks
124-.03305 -.1016 (124*2π)/1391 weeks
125.001 -.15783 (125*2π)/1391 weeks
126-.0355 -.1219 (126*2π)/1391 weeks
127.00438 -.24982 (127*2π)/1391 weeks
128.06921 -.15408 (128*2π)/1391 weeks
129.03643 -.22576 (129*2π)/1391 weeks
130.13715 -.16062 (130*2π)/1391 weeks
131.04627 -.18129 (131*2π)/1391 weeks
132.15945 -.17715 (132*2π)/1391 weeks
133.014 -.14437 (133*2π)/1391 weeks
134.1298 -.31585 (134*2π)/1391 weeks
135.11348 -.24149 (135*2π)/1391 weeks
136.32733 -.41607 (136*2π)/1391 weeks
137.33599 -.11626 (137*2π)/1391 weeks

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