The following idea is about Bitcoin and symmetry.

Total retracement in value = $19764.51 -$3148.33 = $16616.18

50% of total retracement in value = 0.5 * $16616.18 = $8308.09
Beyond Technical AnalysisBitcoin (Cryptocurrency)bitcoinanalysisbitcoindollarbitcoinpricebravenewcoinBTCBTCUSDCyclesHarmonic PatternssymmetryTrend Analysis

Also on:

Disclaimer