Looking for Average "Session-ly" Range Indicator (based on two existing indicators)

Hi!

I have two different MT4-indicators that I like very much: 

One is a "Session Indicator" which shows the beginning and end of the different (Forex-)Trading-Sessions as well as the range and other stuff. 

The second one is an "Average Range Indicator" that shows the average daily, weekly and monthly range (as lines and numbers on the chart). 

Now, my question: 

I would very much like to combine those two indicators with a new idea: 

I would like to have the AVERAGE SESSION-LY RANGE displayed. 

The basis should be the sessions London, New York and Asia (the starting and end time have to be freely selectable as we all live in different timezones and have different brokers). 

Now I want the average range of each session shown seperately (as number of pips AND line on the chart incl. pip distance) --> e.g.: "What is the average range of the last 24 London-Sessions?"

I have looked everywhere but cannot find an indicator like that. It would be more than amazing if anyone of you guys could make that happen and code my request. 

It would be perfect to fully integrate the "Dayweekmonth-Range-Indicator" into the "Session Indicator" and expand it by the average sessions ranges (for ANY forex pair!). 

The two indicators you will find attached.

Thank you very much in advance!