hit counter question

I need a hit counter on Excel 2003 which counts the number of times a
condition is met. This spreadsheet DDEs to RediPlus (trading software).
The DDE fields would be "last price" and "day high price". When last = day
high, I have it flash a green conditional format. What I would like to do
is to not only flash green but also count the number of times last = day
high. For example,

A1 = DDE link to "last price" of IBM (constantly changing)
B1 = DDE link to "day high price" of IBM (changes only when a new high is
made otherwise stays the same)

C1 = alert if they equal (IBM is making a new high) - flashes green via
condiitional format

I would like to put a hit counter in C1 that only increases when last = day
high

Seems simple, but I just can't get it to work

Thanks
Bob