Hope this helps... Yeah I know. Kinda late but I just noticed your post.
Right click or 2 finger tap on track pad if you run a mac and select.....
Chart settings, then select bar settings.
Or you can goto Preferances and add the extended hours button for the tool bar.
You look for the icon for extended data.
on my tool bar it is 3rd from the end ... You can place it anywhere you want in your tool bar.