Hi, I just happened to see your name here from your previous post... no worries about posting elsewhere, this is a big place to find your way around! If you look at the very top of the page you will see the header 'Forums' and by clicking on that you'll see the list of different forums - for future reference, pick which one seems most appropriate and post there. To start with, you can post on the welcome forum and introduce yourself - by telling us a little about yourself and your cat, we can point you in the direction of whichever forum you need to start off with.
A blood glucose curve is simply a record of your cat's bg over a 12 hour cycle, starting with the morning pre shot number (taken before giving insulin) and then at two hourly intervals up to and including the evening pre shot number. The aim of this is to see how any given dose of insulin is working in the cat, and by seeing how quickly the insulin takes effect, what the lowest point is and how long the insulin lasts, we can work out whether a dose adjustment is needed. We log the data on a spreadsheet which we link to our signatures (the info about us and our cats in our profile) so advice givers can see at a click what the numbers are looking like and help you decide if a dose increase or decrease is necessary.
Does this make sense? There is a certain amount of jargon here to get used to - not too bad though when you've got the basics - so if you haven't already I'd suggest having a good look round the board and introducing yourself on the welcome forum, as I mentioned above. If you need help setting up a spreadsheet, just ask, there are people who can help with that.
Good luck!