How to calculate Logarithmic Fibonacci Extensions/Retracements

[eboard10]

I've seen several technical analysis pieces of Bitcoin and other cryptos that use fibonacci extensions to measure price movements.

I've tried doing it myself but very often the price goes way beyond the extensions and that's apparently because you need to use Logarithmic extensions.

Unless someone knows how to get log extensions/retracements, I was wondering if anyone has a way to calculate them?

Thanks