[aw3c2]

I see no interactivity there. The mouse only shows the x and y coordinates. As I said, I am looking for examples where the data is manipulated. Mouse over that shows data values would also be interesting though.

[cuong]

Is the UX really that difficult to understand? There's a selection box at the top-right corner. Click on it and use it to zoom deeper into the graph.

[aw3c2]

Oh, I had no idea what those icons apart from Refresh and Save meant. The zoom icon looked like "new something" to me. Thanks!

[buryat]

Nope, it's not that difficult to understand, though English captions for buttons would be nice to have