My comments.....
More pictures somehow would be good, but your Avatar picture says a lot. That back left leg has actually broken. That isn't just bowing. It will heal better if it was splinted for support during recovery. That will allow it to become solid again in a more straight manner. If it's not splinted it is going to become solid in that position because it is actually broken. Fibrous material will also grow around the area too as her body's method of healing. That process will also make the leg have a big bump along with being crooked. Does the other back leg look like that?
The splinting does not have to be elaborate to provide support. You just need two items that you can get at the drug store. You need a roll of 2" wide flexible wrapping bandage. They make it for people which is usually beige in color. You can buy it at the drug store. Here is a link to what vets use so you can see what it looks like. It has a rough texture like gauze but is slightly sticky. It comes in colors but is the same as the stuff they make for people:
http://www.amazon.com/PetFlex-A-Flexible-Cohesive-Bandage/dp/B002BZYXLO
Then you need a roll of 1" wide white porous "stickie" tape. There are two types of white tape that is sold for first aid purposes. The type you don't want is not porous and it's much stiffer. It's hard to work with and it actually does not stick that well. You want the porous stuff that feels like it's made of cloth. If you can't find it I can send you a roll if you PM me your address. I've got lots on hand.
This is what you do....you cut the 2" wide stuff to a width that will cover the long bone of the affected leg. You want it to cover below the knee and above the foot. Make the strip about 2" long. Then cut a piece of the white sticky tape to the same width and about 3/4" long. To cut the white tape with ease you use the scissors to make a nick in the tape at the width you want and tear the tape to the length you want. Otherwise it sticks to the scissors.
Secure your cham's body (help from another person is good) by wrapping her carefully in a clean wash cloth so that the leg and tail are the only things showing. You want to be careful so you don't break any other soft bones. Wrap the stretchy piece around the bone. It needs to be secure but not so tight it will stop blood flow. After you get that right, tape the white tape around it to secure it and give it a little extra support. The first tape will not stick to the skin but won't stay secure by itself. The white tape would stick to the skin if used alone. It also adds extra support.
If the foot looks swollen the next day then it's too tight. Take it off and redo it. This is enough support to straighten the bone and support it during the process of recalcification. The bone won't be perfect but it will be a whole lot better than just leaving it alone. Three years ago I had an Ambanja that got MBD due to a faulty UVB tube during it's critical months of growing. I used this technique (suggested by my vet) and it worked great. It was used on a hind leg and a front leg on this chameleon.
Every week you would take it off and assess improvement or lack of it. Let me know if you have other questions. I still recommend going to a vet familiar with reptiles. If that is totally not possible than you can try this yourself. I don't advocate people playing vet themselves rather than going to a professional. However, if a vet visit just isn't going to happen, this is something that is effectively and fairly easy to do.