So you know, I have googled for a solution not to avail.

Is there a way to change the color on a column chart if values a
negative on the HORIZONTAL axis?

I’ve uploaded an example chart: http://home.comcast.net/~gegene/prob_01.gif

I’d like the negative column in a different value than the positive
ones.

Is this possible without splitting the data source between positive
and negative values?