may a non -dynatic array be usd as indicator buffer ?

i wang use an array[300] as indicator buffer and use setindicatorbuffer bind it ,is it allowed?

should it use arraysetasseries fuction before use it ? 

if  the array copy the data from an standard indicator buffer ,which will be more efficient through use a for loop and copybuffer/copyarray  function ?

under mql4 and mql5 ,is the above qustion has the same resolution?

thanks .