Interestingly enough, while this is as good as it gets, my initial reaction to domain name was negative. From previous experience I learned that domains like that are taken by squatters or companies that... Well, don't really know how to capitalize on them. Kudos to OP for actually offering something to do with charts! :)
If so. I think this would definitely be worthy of a blog post on exactly how you did it.
Everytime I search for domain names, they are all taken up by squatters who want 5 to 6 figure amounts and they have been sitting on them for more than 5 years, 10 in some cases.
Of course I email them back laughing, but it does mean I have to choose something completely different.
I'm definitely not going to do a snappa.io to snappa.com lol [0].
I really wish there was a legal limit to how long you can squat, say 5 years, before it goes to a lottery system for a pool of people who applied to be apart of the lottery and can show legitimate use for it.