Hi @missaj, thank you for your reaction. 

Those indexes (altcoin index and fiat index) are simply connected to the data extracted from most major crypto exchanges including deposits and withdrawals of specific cryptocurrencies and also the order books and the executed orders. 

You can register for free and check 1 week delayed data - so you can do your own backtest for yourself of crypto you watch - like STEEM. Check it out here [https://controlaltshifts.com](https://controlaltshifts.com/?ref_code=henJSF6rA8&fbclid=IwAR2L78imwOravK9aImv16Cjoa_q2Gx-aAzuf0HqBygg4AZM11dYFvcV78Do)