Chart Patterns & Algorithmic Trader (49) HD Parabolic Arc Pattern Reviewed in CPAT 11/13/17 HD (W) is trading in Parabolic Arc from 10/10/2008 (low: 17.05) to 02/09/2018 (high: 207.60). Parabolic Arc patterns are long-term patterns, but most of the upside parabolic patterns return to at least 50-62% of its prior rise in a correction mode. www.surinotes.com
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