Relative date range - please allow past and future

I was trying to geht the following Behaviour with the Relative Date Range:

Always show - Last 10 Days until the next 2 Days. Very relevant for forecast models relating on the near past.

I thought it could be done with the additional "Starting from" that shifts the window.
But in the described use case it would need NEGATIVE Starting from Value - what Metabase does not allow.

Small Enhancement for Date Picker allowing negatives should do the trick:

interesting feature request, have you created it on our github issue tracker?