Here http://articles.mql4.com/136 you can find a nice script to display all minutes in a chart.
If you drop the script onto a chart it creates a .hst file that you can view on an offline chart.

Coders please help! If you load the .hst file into the history centre it disregards the added minutes created by the script.

I want to load the .hst file into the history centre, select the range I need and export it into a .csv file to open with Excel.

There is a file converter in this thread to convert .hst to .csv, but some people, including me, cannot get it to work.