Beautiful design!<p>Care to share any of the details on the tech? Are you using each of the exchange's individual APIs to calculate the weighted average? Did you use any library or framework to help with websockets, or to look at the blockchain?<p>The meaning of "Estimated Money Sent" was a little confusing to me, even after reading the definition on the About page.<p>What do the scrolling numbers in the background mean? I imagine there aren't enough of them to be all of the realtime transactions happening on the blockchain. Also, I'm sure you know, but they overlap when showing as 600x120 in iframe mode.<p>Allowing users to embed the widget in an iframe is nice and a good way to spread the word about your site. Maybe unbury that from the About page and link directly to an 'Embed this' page from the main page, and (as silly as it sounds) use something like clipboardjs to make copying the snippet to the clipboard easier.