You don't even need any spreadsheets, you can open any currency and sort by price, then take pairs from the top and the bottom of the list. The problem is gett

You don't even need any spreadsheets, you can open any currency and sort by price, then take pairs from the top and the bottom of the list. The problem is getting currencies in and out of exchanges in time and paying all the fees, while still making a profit. While there are fast cryptocurrencies like Ethereum and Litecoin, most exchanges still force you to wait for something like 6 confirmations. Which takes minutes to hours. And forget about doing this with USD, it takes days to move from one exchange to another. If you look at the exchange rates, fast pairs all have very similar exchange rates on different exchanges, because you aren't the only one doing this.