Chart Problems

Here is the chart I have.

Image may be NSFW.
Clik here to view.

https://www.dropbox.com/s/q5dub2p1pblrwjl/Capture.PNG?dl=0

I would like to change some things:

1. Last point is not fully displayed.
2. not all the times are being displayed on the x-axis.
3. would like the x-axis labels to slant down.
4. I have another field with the date of each reading. Any way to have the x-axis label display the time and date?

Thanks