The ability to analyze all of our historical exchange rate data in one place. It allows us to quickly see if there is any evidence that we should be paying more attention to certain currencies or not, and whether they are generally trending up (or down). I wish it was easier for people without programming knowledge to use - you need some coding experience as well. Also, the design could do with an update. There are still old-school tables floating around when newer interfaces would have been better suited. Being able to look at trends over time across multiple exchanges. This has allowed us to get early warning signs of currency movements which enables us make timely decisions on what trades/investments we want to take.