The javascript reimplementation of the venerable Plotly charting library provides a highly functional wrapper around d3 and svg. Most notable is its ability to gracefully browse tens of thousands of samples. We also admire its flicker-free incremental live updates. example 
First we should duplicate within the plugin paradigm the Datalog viewing that we now do with ad-hoc html/script pages. We anticipated this function with our earliest plugins. See About Line Plugin
Plotly provides excellent pan and zoom functionality and will emit events such that a plugin can capture and distribute the selected data. plotly