You can't call particular moves...even from a scrum...if you are too close to your own try line...can only choose kick to get out of danger zone.......
If players are in ruck or were part of tackle etc.......you may not be able to call a backline move - do your own...learn to attempt a move and if nothing happens instantly opt for something else....don't sit there mashing at the d-pad, while the defence sets up and momentum is lost.
If it is going to take too long (too much red flashing) to get everyone into position, you will lose the ball before you can do so, so opt out and just do your own moves (get good at these)...
Now the key for doing moves nearly all the time if you choose......from almost every single ruck if you choose......
.........drum roll please!.....
TIP: When you press down R3 to regain possession going into a tackle (do not do it when really isolated or you may incur a penalty (but may yet re-rip it.....you will see if timing is generally good! hehe.......also do when momentum is up and in other half otherwise).....you hit the deck and are still holding onto the ball - thus the clear arrow is above the ballcarrier's body...
NOW
keep holding it in ruck (this is all obviously happening over a matter of just seconds)....and INITIATE a move with d-pad.......wait a second or so...then release ball...
Icon will shift to halfback's head (the arrow) and it will be green as you have pre-selected the move (time spent with the ball allowed the move to be chose by hb - but because arrow was over ball carrier, no flashing or green is detected) and you can instantly launch it - NO flashing of icon as you get better at timing it, even so - will be minimal flashing if don't...
This stops turnovers as you are trying to initiate move (if this is a problem).....
and is good in Multi-player as you are suddenly launching a move with no clue given until the last second that this is what you intend doing.......