Here's a quick example showing how to do some simple sparklines using Sencha Touch Charts. Not sure STC are the best solution for this problem, because most of the capabilities they provide are not used for sparklines. But if you're already using them for more elaborate charts, you can also use them for sparklines.

See example here:
http://web.me.com/jeffreycrogers/tou...ne2/index.html

See javascript here:
http://web.me.com/jeffreycrogers/tou...2/src/index.js

Code improvements are welcome.