Bitcoin Sine Wave Power Law Model

Based on the " Bitcoin Rainbow Wave" indicator by leoum on Tradingview (https://www.tradingview.com/script/v0nW85bF-Bitcoin-Rainbow-Wave/). Intended for medium to long term use on the log scale BTCUSD chart. 

The indicator displays the power law model with upper and lower limit bands as well as intermediate "rainbow" bands.

It also plots a secondary sinusoidal wave with its own limit and intermediary bands, intended to model bitcoin's price fluctuations which are theorized to be caused by the halving cycle.