Market Profile (price volume histogram) indicator

Hi I want to create a market profile indicator (price volume histogram) on 5 minute chart that will show the volume for each price over a daily session.

Would like to get some pointers on how I can develop such indicator.

I am looking at the MT4 indicator that I downloaded by googling and looks like a long way for me to understand the MT4 code and then build an equivalent in C#.

But I will give a try. Anybody who can provide any clues how to build.