Am I trying to put too much data into a chart - what are alternatives?

[trstew]

I started out to show daily/hourly trends for weights, e.g., are all days fairly close between 7 pm - 9 pm, etc. Besides the fact that my design appears crammed, I couldn't figure how to get the hours of the day along the horizontal axis (where days are now). (Also, I'd like to "stretch" the depth axis so all days are showing).
However, I suppose all this is moot if there's a better way to do this - I don't really need a chart column for every hour of every day, just really trends...
Any suggestions to help out would be great - as you can see, I'm not exactly a chart guru...