In December 2018 masterluc wrote on his PentarhUdi trandingview account that bitcoin was
" leaving straight-style log trend while continue to grow in SQRT-style trend"
https://www.tradingview.com/chart/BTCUSD/JSP3KDmy-New-long-term-prediction-as-I-see-it-now/
This is well worth pursuing. But I don't think Tradingview has the right tools for it. Masterluc just glommed a couple of vague swoopy curved lines on the chart. Yet we can do much better.
I went to bitcoincharts(dot)com to download the price history for Mt Gox and Bitstamp, and concatenated them in a LibreOffice Calc spreadsheet for a continuous price history going back to 2010.
Then I ran iterated quadratic regressions. The parabola has a horizontal axis of course, which means treating time as a function of price. Once you get the quadratic, easy enough to solve it, giving a conventional graph with price as a function of time.
results here
https://hardworkandlowpay.wordpress.com/charts/After deriving the parabola for the line of support (red on the chart), I found that by shifting that curve 45 months in time, it just touched the last two big blow-off tops; you can see this line in green on the chart. The two parabolas are essentially identical, sharing the same axis and focal length. The nested parabolas never intersect.