Universal cryptocurrency Profitability Calculator

[Woukaine]

Hello,

I use cryptocompare.com to calculate my profitability. But only these currencies are available: BTC ETH ETC XMR ZEC PASC DASH LTC

I am looking for the formula to calculate profitability for any currency. The operation is often the same for altcoin so it should be possible!

I am looking for this formula in javascript preferably, someone has a documentation to follow?

thank you !