The sequence of numbers (0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233…), discovered by the Italian mathematician Leonardo de Pisa in the 13th century, where the first two terms of the sequence are 0 and 1 and each successive number in the sequence is the sum of the previous two numbers. The sequence is used by technicians, especially those applying Elliott Wave techniques, to project the timing and magnitude of expected moves.

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