Jodie,
the problem with doing it with a macro is that when the cell is shaded then
shaded it remains. If the value in the cell changes to less than zero the
colour remains.
Conditional formatting is different, here Excel monitors the value based
upon the conditional format you set so lets see how to do it.
I don't know your version of Excel so I assume E2003. Select A1 and try this
Click Format|Conditional formatting
Formula is and enter the formula
=A1>0
Pattern tab and choose a colour
OK
Now try entering values in a1 and see the colour change. You can use the
format painter to copy this CF into multiple cells
--
Mike
When competing hypotheses are equal, adopt the hypothesis that introduces
the fewest assumptions while still sufficiently answering the question.
Occam''s razor (Abbrev)