update field, but show the lastest updates

Hi! I'm french , i hope my english is not too bad. The university seems so far away now... lol. I'll try my best in english you can be sure.

In fact,I'm creating a website about "loosing weight".

I want the users can update their weight in profil. but keeping the old updates to see the evolution and with the ability to show time update. And the total weight lost if it's possible.
Do you think is possible with CB plugins or other?

I hope my english is not too bad, i can try again if you don't understand.

an exemple:
(the tab)->"weight updates"

(the fiels)->
123lbs 12/25/2011
130lbs 08/12/2010
135lbs 09/13/2009
140lbs 12/20/2009
150lbs 12/25/2008

Total since the begining: -27lbs.

Thank you for replys.
best regards

That's called a "Repeating Field", which we unfortunately do not have such a field (not until CB 2.0). It's possible you could use CB Auto Actions to catch the after profile update trigger, check if the field was changed in a condition, then using a query action push the value to a database table (you'd need to create such a table). Once done you'd use CB Query Field to pull the results and display them on profile as a list like you're wanting.