Two things to improve the 95th percentile:

First, the calculation seems only correct when having only one item in your graph. When you have in- and outbound traffic in your graph the calculation joins both in and out data records, sorts them and removes the top 5 percent. If your In traffic is always higher than Out, the only thing to correct this is to make a 97.5th percentile because a 95th would remove 10% of the In traffic. This is just an example but in many cases the calculation is not ideal.

Second, but this is more a feature request, i would like a real 5min avg 95th percentile instead of 2h avg. A 2 hour avg is always lower than a 5 min avg.