Help with candling please

[AusChook]

I am new to the chicken thing. I am incubating my first lot of eggs. We are on day 5. I know a lot of people say to wait to candle until day 5 but I've had clear veining since day 3 and I'm enjoying documenting the eggs progress each day. I am just wondering with the veins if they should move. Day 3 and 4 when I gently turned the egg while candling the yolk moved with the veins always coming to the top. Now however the veins are staying in the one position. So if I roll the egg while candling it the veins aren't going to the top. I can still see the yolk or would it be embryo moving when the egg moves. I put an egg in 24 hours after the others so its on day 4 and the whole yolk with veins included are moving so I'm assuming this is normal.

 

[Sally Sunshine]

I only start candle at day 7... here is some info

https://www.backyardchickens.com/a/hatching-eggs-101

Sites to refer to for Candling Images and Videos

Progression Though Incubation
https://www.backyardchickens.com/t/261876/chicks-are-here-egg-candling-pics-progression-though-incubation

Great pics of CANDLING and good and bad eggs.......
http://animalscience.ucdavis.edu/Avian/pfs32.htm

Metzer Candling :
http://www.metzerfarms.com/Candling.cfm

Hatching Guide:
https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed

Development of a Chick:
http://chat.allotment.org.uk/index.php?topic=73884.0

Candling Pics:
http://shilala.homestead.com/candling.html
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