dygraphs can do (b) & (c): http://dygraphs.com/tests/stacked.html http://dygraphs.com/tests/stacked.html http://dygraphs.com/tests/dynamic-update.html http://dy

dygraphs can do (b) & (c): http://dygraphs.com/tests/stacked.html http://dygraphs.com/tests/stacked.html http://dygraphs.com/tests/dynamic-update.html http://dygraphs.com/tests/dynamic-update.html You could hack in (a), though it might be a bit of a challenge. If you have a lot of data, the other valuable thing that dygraphs gives you is the ability to pan/zoom your charts.