Hi! quick question.... your saying you couldnt see much when you candled? Sometimes you can see where their yolk sacks are located when candled, the lighter spots when candling, you may need to look for this if you need to assist to try to figure out positions. This is all uncharted territory so you should really study on positions, so you can make your best judgements later on. You may just be very lucky and have them be able to pip and hatch!
A few things you can keep in mind
Malpositions are either the first to pip or they are the remaining eggs that just cant get into a position to pip at all. Therefor my guess is if you see an internal pip, you may only get one out of it, unless it can open that membrane up enough for the other to get air inside. Chances of DIS are very high I am sure you are aware, nothing much you can do but pray and wait to see what happens. My guess is if it internally pips it should be able to open the shell, a mal pip may need help at some point.
Study this awhile along with the links the others have given
*IMPORTANT INFO= TIMELINES PIPS ZIPS!!! & MARKING AIR CELLS DAY 18, DRAW DOWN, INTERNAL PIP, EXTERNAL PIP, and ZIPPING post #35770
Also see this section 911- INCUBATION & CHICK EMERGENCIES! HERE
A few things you can keep in mind
Malpositions are either the first to pip or they are the remaining eggs that just cant get into a position to pip at all. Therefor my guess is if you see an internal pip, you may only get one out of it, unless it can open that membrane up enough for the other to get air inside. Chances of DIS are very high I am sure you are aware, nothing much you can do but pray and wait to see what happens. My guess is if it internally pips it should be able to open the shell, a mal pip may need help at some point.
Study this awhile along with the links the others have given
*IMPORTANT INFO= TIMELINES PIPS ZIPS!!! & MARKING AIR CELLS DAY 18, DRAW DOWN, INTERNAL PIP, EXTERNAL PIP, and ZIPPING post #35770
Also see this section 911- INCUBATION & CHICK EMERGENCIES! HERE