Plotted here is Bitcoin's "Genesis Fib", in 3 different timeframes. Every one of these levels has been key on the way up and down. We have just bounced with a "Ping" on last major fib before 50k.
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I do not use "Fibs" in the "traditional" manner (retracements). I use Fibs to plot "Ripples" (extensions) created by "Impulses". Then look for "Confluences" to map the "interference Pattern".