Graphing calender chart with combined relative amounts for each date

Hi there,

I would like to know if it is possible to let excel draw a graph with
on the x-axis dates and on the y-axis the corresponding relative
changes in account balance.

In my case it is possible that there are multiple account changes on
an individual date but also there are dates without changes which are
not included in the excel sheet.

I'll try to make it a bit more clear by a short example:

1-1-2009, $200
1-1-2009, -$150
3-1-2009, $500
4-1-2009, -$350

I would like this to result in a graph like this:

x-axis:
1-1, 2-1, 3-1, 4-1

y-axis:
$50, $0, $500, -$350

If someone could help me out here, that would be great!

Kr, Nick