The method I use for ADVFN charts is to click on the little camera bottom right, and then click the link line to the left that refers to grabber. This gives you a new window (A) to either VIEW, which gives you another window (B) with the image in it to right click and copy, or you can select the link text (window A) to the left of VIEW, and copy/paste this into the posting window. Don't then go back to window A and delete the entry otherwise you lose the picture from the thread.
Doesn't give you the same flexibility as MAXI, but is simple.