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The Continuous Wavelet Transform and Discrete Wavelet Transform were both used in the non-linear and aperiodic Crude Oil Futures signal. It allowed us to see possible periodicity and trends within the signal. The next two figures shows us both the Continuous and Discrete wavelet transforms.

Crude oil futures continuous wavelet transform

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Continuous Wavelet Transform of Crude Oil Futures.

Level 3 approximation of crude oil futures

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The Level 3 Approximation of Crude Oil Futures.

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Source:  OpenStax, Wavelet analysis of crude oil futures. OpenStax CNX. Dec 19, 2011 Download for free at http://cnx.org/content/col11397/1.1
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