The best way to add your chart to all your posts is to add it from your profile.
Click on the Profile link at the very top of the main forum screen to access your forum profile.
A small "Charts" button will be displayed at the top of your posts next to your nickname. Clicking on this button will lead to your Fertility Friend's home page.
You can also add your chart in your posts on a one of basis, by using the Current Chart Snapshot checkbox whne composing your post or reply.