In addition to linking to your chart via your home page, you can directly insert your home page chart image into your posts.
Make sure that your home page is configured and that the charts you wish to show are visible on it.
When you compose your posts you will see the following new "Chart" drop down list:
This list contains all the charts on your home page.
Set your cursor in your post where you wish to insert your chart and then select the chart from the list. A code will be generated which will be replaced by your chart once you submit your post. The chart inset will look like the following:
Get Pregnant Faster
Start Charting Now