Feature request - distance to trendline(s)

This request is in connection with MC-300 and MC-290. I would like to easily know the distance between a close and trendline(s). The distance would be expressed in % according to the current level of the trendline. On the chart given as an example :
- close is at 56.30
- trendline 1 is at 38.16 
- trendline 2 is at 50.00 
Then
- distance from trendline 1 = 18.14 -> 47.54 %
- distance from trendline 2 = 6.30 -> 12.60 %
It is important that the percentage relates to the trendline. I want to know the distance relatively to the trendline. ie the % = [ (close - trendline) / trendline ] * 100
This is an important request (for me) as I use it in my daily technical analysis.
Thank you.