Well, its not simply a crystal ball, but it might look like one. Those indexes 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. Its simple and precise at the same moment. You can give it a try with a free registration where you will see 1 week delayed data - so you can do the backtest for yourself if it is a good tool for you or not. Check it out here https://controlaltshifts.com