When mousing over a data point in a chart, it would be nice to see the actual value for the point.
When anomalies are turned on, the mouseover shows the anomaly detail (% above/below expected). It seems like a natural that the actual value would show when mousing over. The date is nice, but that's actually easier to figure out from the x-axis. Ideally, it would show both.
I realize this detail is in the underlying table, but I frequently kill the table and just leave the line chart, so the user loses the ability to see the specific value.