I know AmiBroker is really perfect on many aspects.
here, I just give you my suggestion,
you have the right to consider it or not
(I respect you and your feeling).
As figure below, I use the original setting for Editor with [v]Immediate.
so I type 'plo' then Formula Editor showed a list of candidates,
and stayed on 'Plot' as figure below:
then I can press [Enter] to accept it correctly (really perfect).
My suggestion are:
Add two hot keys [ Space ] or [ ( ]
for "automatic-statement-completion"
to accept the option on the list of candidates,
for example, after I type 'plo'
then I can use [ Space ] or [ ( ]
to accept current option 'Plot' on the list of candidates.
These two hot keys can be found on Microsoft Visual studio,
and it is very convenient for programmer.
Every time I suggest a new function to Dr. Tomasz,
I will worry about it for many days,
and I am always afraid of knowing the answer from Dr. Tomasz,
sometimes my suggestion is too trivial (my bad),
but they are my real expectation or habits on using AmiBroker,
so, finally I always encouraged myself and posted it.
Panos, I think you, maybe, are not a English speaker,
so please copy and paste my article to Google translation,
then you will much more understand what I mean.
In this article, I suggest to add hotkeys for the list of candidates.
but every designer has her/his own principles of development,
so I cannot force any one to do any thing,
all I can do is giving my suggstion.