Time threshold based on "Highest Value Ever"?

[HBomb]

You know how the baseline type threshold looks at a period of time, but has the ability to extrapolate from the current value in the graph..
And the Time based ones work off a value entered in the threshold..

Is there a way instead of entering the values for the Time Based threshold to get those values dynamically, particularly the highest value observed for the data source?

[HBomb]

A workaround for me would be if I could specify the time reference in the past with the baseline deviation method, I've seen screenshots of older versions having a field for a user specified value now I only have a drop down with 6 minutes average, 24 minutes average and 4.8 hours average...

Well I've changed the field in the DB but im yet to see if it works will update in 2-3 days.