I ran across this HTML5 trading framework awhile back that was wondering if this may be something that could be used with SAFE once the Safecoins get up and running. It looks like it uses HTML5 and JS with websockets to access a lot of the data.
Not sure if it is heavily server reliant, but may be a framework worth looking at. (It was designed for market trading but can take data feeds from any asset and chart and trade them from the software…)
(note, it is not open source, but you can buy the platform and source for a few hundred bucks and tweak it to your heart’s content)
Interesting stuff…I dont know enough about the code/server side to see if it would be useful or able to be re-purposed or what not but thought I would share…