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Fourier Analysis of ANGI (Angie's List, Inc.)


ANGI (Angie's List, Inc.) appears to have interesting cyclic behaviour every 16 weeks (.4956*sine), 22 weeks (.4772*sine), and 17 weeks (.426*cosine).

ANGI (Angie's List, Inc.) has an average price of 11.64 (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 11/17/2011 to 12/5/2016 for ANGI (Angie's List, Inc.), this program was able to calculate the following Fourier Series:
Sequence #Cosine Coefficients Sine Coefficients FrequenciesPeriod
011.64011   0 
1-.24146 5.81621 (1*2π)/265265 weeks
2-.34251 -2.29572 (2*2π)/265133 weeks
31.83365 .8068 (3*2π)/26588 weeks
4.08049 2.50808 (4*2π)/26566 weeks
5-1.30021 .49758 (5*2π)/26553 weeks
6.71818 -.75306 (6*2π)/26544 weeks
7.18289 .44645 (7*2π)/26538 weeks
8-.69091 .21241 (8*2π)/26533 weeks
9.29206 .2552 (9*2π)/26529 weeks
10-.05808 .41191 (10*2π)/26527 weeks
11-.17366 -.25279 (11*2π)/26524 weeks
12-.15493 .47722 (12*2π)/26522 weeks
13-.369 .07829 (13*2π)/26520 weeks
14.34719 .28711 (14*2π)/26519 weeks
15.06731 -.02412 (15*2π)/26518 weeks
16.42598 .33098 (16*2π)/26517 weeks
17.12271 .49563 (17*2π)/26516 weeks
18.08228 .225 (18*2π)/26515 weeks
19.18256 .14216 (19*2π)/26514 weeks
20-.07044 .20135 (20*2π)/26513 weeks
21-.16263 -.27355 (21*2π)/26513 weeks
22-.20447 .03794 (22*2π)/26512 weeks
23.15504 .00041 (23*2π)/26512 weeks
24.0752 .00998 (24*2π)/26511 weeks
25.19225 .12477 (25*2π)/26511 weeks
26-.2008 .19303 (26*2π)/26510 weeks
27-.03365 -.19593 (27*2π)/26510 weeks
28.2409 .29953 (28*2π)/2659 weeks
29-.07895 -.04329 (29*2π)/2659 weeks
30-.03751 .01199 (30*2π)/2659 weeks
31.14115 .02046 (31*2π)/2659 weeks
32-.01951 .10394 (32*2π)/2658 weeks
33-.07288 .1132 (33*2π)/2658 weeks
34-.14275 -.00242 (34*2π)/2658 weeks
35.03119 -.01405 (35*2π)/2658 weeks
36-.0007 .12447 (36*2π)/2657 weeks
37-.0996 .09653 (37*2π)/2657 weeks
38-.05114 -.10759 (38*2π)/2657 weeks
39.05527 .04349 (39*2π)/2657 weeks
40-.2028 -.09149 (40*2π)/2657 weeks
41.10966 -.16303 (41*2π)/2656 weeks
42.18252 .15614 (42*2π)/2656 weeks
43.02308 -.06618 (43*2π)/2656 weeks
44.1702 .07234 (44*2π)/2656 weeks
45-.16375 .09085 (45*2π)/2656 weeks
46.05483 .03949 (46*2π)/2656 weeks
47-.01136 .13586 (47*2π)/2656 weeks
48.04508 -.06683 (48*2π)/2656 weeks
49.12808 -.03151 (49*2π)/2655 weeks
50.01023 .0431 (50*2π)/2655 weeks
51-.0641 .02087 (51*2π)/2655 weeks
52.03266 -.08624 (52*2π)/2655 weeks
53.11502 -.01181 (53*2π)/2655 weeks
54.08437 -.09365 (54*2π)/2655 weeks
55.10936 .01296 (55*2π)/2655 weeks
56.09546 .08031 (56*2π)/2655 weeks
57.06144 -.03018 (57*2π)/2655 weeks
58.08227 .10559 (58*2π)/2655 weeks
59-.01477 -.00064 (59*2π)/2654 weeks
60.08664 -.00721 (60*2π)/2654 weeks
61.04862 .09431 (61*2π)/2654 weeks
62-.00655 .03903 (62*2π)/2654 weeks
63.06366 .00925 (63*2π)/2654 weeks
64.05673 .05441 (64*2π)/2654 weeks
65.09465 .03012 (65*2π)/2654 weeks
66.01432 .0671 (66*2π)/2654 weeks
67.06421 .02151 (67*2π)/2654 weeks
68.02635 -.06315 (68*2π)/2654 weeks
69.03203 .02022 (69*2π)/2654 weeks
70.08278 .00118 (70*2π)/2654 weeks
71.07943 .04175 (71*2π)/2654 weeks
72-.01141 .03983 (72*2π)/2654 weeks
73.00571 -.04972 (73*2π)/2654 weeks
74.0818 .03344 (74*2π)/2654 weeks
75.00592 .06596 (75*2π)/2654 weeks
76-.06961 .02626 (76*2π)/2653 weeks
77.02632 -.02943 (77*2π)/2653 weeks
78-.02449 .01778 (78*2π)/2653 weeks
79.00397 -.05861 (79*2π)/2653 weeks
80.02437 -.00031 (80*2π)/2653 weeks
81.01065 -.07724 (81*2π)/2653 weeks
82.13217 -.06227 (82*2π)/2653 weeks
83-.01656 .06305 (83*2π)/2653 weeks
84-.00021 -.17982 (84*2π)/2653 weeks
85.26261 .02103 (85*2π)/2653 weeks
86-.03272 .1056 (86*2π)/2653 weeks
87.02936 -.10605 (87*2π)/2653 weeks
88.06802 .07694 (88*2π)/2653 weeks
89.03367 -.01534 (89*2π)/2653 weeks
90.07467 -.08531 (90*2π)/2653 weeks
91.03341 -.01023 (91*2π)/2653 weeks
92.06936 .03521 (92*2π)/2653 weeks
93.09727 .04022 (93*2π)/2653 weeks
94.04477 .03249 (94*2π)/2653 weeks
95.01844 -.0367 (95*2π)/2653 weeks
96.0698 -.03938 (96*2π)/2653 weeks
97.12923 -.02723 (97*2π)/2653 weeks
98.08589 .05891 (98*2π)/2653 weeks
99.06354 .08195 (99*2π)/2653 weeks
100-.0697 .02321 (100*2π)/2653 weeks
101.04542 .0085 (101*2π)/2653 weeks
102-.00133 .03243 (102*2π)/2653 weeks
103.04256 .06386 (103*2π)/2653 weeks
104-.0075 .00535 (104*2π)/2653 weeks
105-.02669 .01449 (105*2π)/2653 weeks
106.07883 -.02744 (106*2π)/2653 weeks
107.06419 .10816 (107*2π)/2652 weeks
108-.03596 -.08502 (108*2π)/2652 weeks
109.1319 -.0315 (109*2π)/2652 weeks
110.0164 .12469 (110*2π)/2652 weeks
111-.03654 -.04995 (111*2π)/2652 weeks
112.1086 -.02995 (112*2π)/2652 weeks
113.0108 .04964 (113*2π)/2652 weeks
114.01041 .03473 (114*2π)/2652 weeks
115.0593 .03345 (115*2π)/2652 weeks
116-.02242 .02836 (116*2π)/2652 weeks
117-.00628 .03976 (117*2π)/2652 weeks
118.02155 -.04166 (118*2π)/2652 weeks
119-.01659 .03605 (119*2π)/2652 weeks
120.05115 .01436 (120*2π)/2652 weeks
121-.02924 .00524 (121*2π)/2652 weeks
122.0489 -.02471 (122*2π)/2652 weeks
123-.01753 -.03491 (123*2π)/2652 weeks
124.0279 .00839 (124*2π)/2652 weeks
125.03518 -.02847 (125*2π)/2652 weeks
126.0461 -.03462 (126*2π)/2652 weeks
127.02054 -.07471 (127*2π)/2652 weeks
128.07208 .05619 (128*2π)/2652 weeks
129.01021 .00504 (129*2π)/2652 weeks
130.03062 -.0967 (130*2π)/2652 weeks
131.11019 .06043 (131*2π)/2652 weeks
132-.04 .04757 (132*2π)/2652 weeks
133-.04 -.04757 (133*2π)/2652 weeks
134.11019 -.06043 (134*2π)/2652 weeks
135.03062 .0967 (135*2π)/2652 weeks
136.01021 -.00504 (136*2π)/2652 weeks
137.07208 -.05619 (137*2π)/2652 weeks
138.02054 .07471 (138*2π)/2652 weeks
139.0461 .03462 (139*2π)/2652 weeks
140.03518 .02847 (140*2π)/2652 weeks
141.0279 -.00839 (141*2π)/2652 weeks
142-.01753 .03491 (142*2π)/2652 weeks
143.0489 .02471 (143*2π)/2652 weeks
144-.02924 -.00524 (144*2π)/2652 weeks
145.05115 -.01436 (145*2π)/2652 weeks
146-.01659 -.03605 (146*2π)/2652 weeks
147.02155 .04166 (147*2π)/2652 weeks
148-.00628 -.03976 (148*2π)/2652 weeks
149-.02242 -.02836 (149*2π)/2652 weeks
150.0593 -.03345 (150*2π)/2652 weeks
151.01041 -.03473 (151*2π)/2652 weeks
152.0108 -.04964 (152*2π)/2652 weeks
153.1086 .02995 (153*2π)/2652 weeks
154-.03654 .04995 (154*2π)/2652 weeks
155.0164 -.12469 (155*2π)/2652 weeks
156.1319 .0315 (156*2π)/2652 weeks
157-.03596 .08502 (157*2π)/2652 weeks
158.06419 -.10816 (158*2π)/2652 weeks
159.07883 .02744 (159*2π)/2652 weeks
160-.02669 -.01449 (160*2π)/2652 weeks
161-.0075 -.00535 (161*2π)/2652 weeks
162.04256 -.06386 (162*2π)/2652 weeks
163-.00133 -.03243 (163*2π)/2652 weeks
164.04542 -.0085 (164*2π)/2652 weeks
165-.0697 -.02321 (165*2π)/2652 weeks
166.06354 -.08195 (166*2π)/2652 weeks
167.08589 -.05891 (167*2π)/2652 weeks
168.12923 .02723 (168*2π)/2652 weeks
169.0698 .03938 (169*2π)/2652 weeks
170.01844 .0367 (170*2π)/2652 weeks
171.04477 -.03249 (171*2π)/2652 weeks
172.09727 -.04022 (172*2π)/2652 weeks
173.06936 -.03521 (173*2π)/2652 weeks
174.03341 .01023 (174*2π)/2652 weeks
175.07467 .08531 (175*2π)/2652 weeks
176.03367 .01534 (176*2π)/2652 weeks
177.06802 -.07694 (177*2π)/2651 weeks
178.02936 .10605 (178*2π)/2651 weeks
179-.03272 -.1056 (179*2π)/2651 weeks
180.26261 -.02103 (180*2π)/2651 weeks
181-.00021 .17982 (181*2π)/2651 weeks
182-.01656 -.06305 (182*2π)/2651 weeks
183.13217 .06227 (183*2π)/2651 weeks
184.01065 .07724 (184*2π)/2651 weeks
185.02437 .00031 (185*2π)/2651 weeks
186.00397 .05861 (186*2π)/2651 weeks
187-.02449 -.01778 (187*2π)/2651 weeks
188.02632 .02943 (188*2π)/2651 weeks
189-.06961 -.02626 (189*2π)/2651 weeks
190.00592 -.06596 (190*2π)/2651 weeks
191.0818 -.03344 (191*2π)/2651 weeks
192.00571 .04972 (192*2π)/2651 weeks
193-.01141 -.03983 (193*2π)/2651 weeks
194.07943 -.04175 (194*2π)/2651 weeks
195.08278 -.00118 (195*2π)/2651 weeks
196.03203 -.02022 (196*2π)/2651 weeks
197.02635 .06315 (197*2π)/2651 weeks
198.06421 -.02151 (198*2π)/2651 weeks
199.01432 -.0671 (199*2π)/2651 weeks
200.09465 -.03012 (200*2π)/2651 weeks
201.05673 -.05441 (201*2π)/2651 weeks
202.06366 -.00925 (202*2π)/2651 weeks
203-.00655 -.03903 (203*2π)/2651 weeks
204.04862 -.09431 (204*2π)/2651 weeks
205.08664 .00721 (205*2π)/2651 weeks
206-.01477 .00064 (206*2π)/2651 weeks
207.08227 -.10559 (207*2π)/2651 weeks
208.06144 .03018 (208*2π)/2651 weeks
209.09546 -.08031 (209*2π)/2651 weeks
210.10936 -.01296 (210*2π)/2651 weeks
211.08437 .09365 (211*2π)/2651 weeks
212.11502 .01181 (212*2π)/2651 weeks
213.03266 .08624 (213*2π)/2651 weeks
214-.0641 -.02087 (214*2π)/2651 weeks
215.01023 -.0431 (215*2π)/2651 weeks
216.12808 .03151 (216*2π)/2651 weeks
217.04508 .06683 (217*2π)/2651 weeks
218-.01136 -.13586 (218*2π)/2651 weeks
219.05483 -.03949 (219*2π)/2651 weeks
220-.16375 -.09085 (220*2π)/2651 weeks
221.1702 -.07234 (221*2π)/2651 weeks
222.02308 .06618 (222*2π)/2651 weeks
223.18252 -.15614 (223*2π)/2651 weeks
224.10966 .16303 (224*2π)/2651 weeks
225-.2028 .09149 (225*2π)/2651 weeks
226.05527 -.04349 (226*2π)/2651 weeks
227-.05114 .10759 (227*2π)/2651 weeks
228-.0996 -.09653 (228*2π)/2651 weeks
229-.0007 -.12447 (229*2π)/2651 weeks
230.03119 .01405 (230*2π)/2651 weeks
231-.14275 .00242 (231*2π)/2651 weeks
232-.07288 -.1132 (232*2π)/2651 weeks
233-.01951 -.10394 (233*2π)/2651 weeks
234.14115 -.02046 (234*2π)/2651 weeks
235-.03751 -.01199 (235*2π)/2651 weeks
236-.07895 .04329 (236*2π)/2651 weeks
237.2409 -.29953 (237*2π)/2651 weeks
238-.03365 .19593 (238*2π)/2651 weeks
239-.2008 -.19303 (239*2π)/2651 weeks
240.19225 -.12477 (240*2π)/2651 weeks
241.0752 -.00998 (241*2π)/2651 weeks
242.15504 -.00041 (242*2π)/2651 weeks
243-.20447 -.03794 (243*2π)/2651 weeks
244-.16263 .27355 (244*2π)/2651 weeks
245-.07044 -.20135 (245*2π)/2651 weeks
246.18256 -.14216 (246*2π)/2651 weeks
247.08228 -.225 (247*2π)/2651 weeks
248.12271 -.49563 (248*2π)/2651 weeks
249.42598 -.33098 (249*2π)/2651 weeks
250.06731 .02412 (250*2π)/2651 weeks
251.34719 -.28711 (251*2π)/2651 weeks
252-.369 -.07829 (252*2π)/2651 weeks
253-.15493 -.47722 (253*2π)/2651 weeks
254-.17366 .25279 (254*2π)/2651 weeks
255-.05808 -.41191 (255*2π)/2651 weeks
256.29206 -.2552 (256*2π)/2651 weeks
257-.69091 -.21241 (257*2π)/2651 weeks
258.18289 -.44645 (258*2π)/2651 weeks
259.71818 .75306 (259*2π)/2651 weeks
260-1.30021 -.49758 (260*2π)/2651 weeks
261.08049 -2.50808 (261*2π)/2651 weeks
2621.83365 -.8068 (262*2π)/2651 weeks
263-.34251 2.29572 (263*2π)/2651 weeks

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