I asked this earlier and you didn't answer me so I'm going to ask one more time.
When you are candling the egg and seeing movement in the air cell are you seeing the movement on its own... While you are being still or are you seeing movement while you are moving the egg.
I know this is not a very clear question for someone that has not incubated before but if it were a live chick inside the egg you would see movement on its own.
If the movement you are seeing is only when you wiggle the egg then that is not a good sign.