Problem with graphing

[davidJIBS]

Hi,

Im using this excel sheet to put in new data in the red marked part of the left picture everyday and I want the graph to show my day to day progress without changing the data field every time I enter in new data. The problem is that the blank cells are causing the graph to go down to zero... How do I avoid this problem?

Here is the picture of the problem: asd.png

Thanks in advance!