Simple indicator request

I need an indicator that will plot as a histogram the difference between todays close and the close 2 bars before it.

Example: today is wednesday, need to plot difference between weds close and mondays close.

Also if possible: Could a variable be choices of highs, lows and midpoints in addition to the close.

Example: The difference between Weds midpoint and Mondays midpoint.

Thank you

hey rick....... before going further, check this out and see if it's what you had inteneded.....

timeframe sets bar, such as 1440 is day, 240 is 4hour and so on....

shift sets the lookback bar, 2 would evaluate fridays close against wendsdays close.... 3 would be friday vs tuesday, and so on......h

Yes...so far so good...is it possible to compare highs, lows and midpoints as choices also?

Thank you very much!