Is it possible to have an indirect link for the cell range in a formula?

[CV12]

Hello,

In the formula underneath, the number 19 is variable.
In cell A1, I used a count row formula, so I would like to refer to that cell.
Is this somehow possible with indirect? I can't get it to work

=SORT(FILTER((Helpersheet!AB2:BD19);Helpersheet!BD2#<>"");1;1)

Thanks in advance

 

[Fluff]

How about

=SORT(FILTER(Helpersheet!AB2:INDEX(Helpersheet!BD:BD;A1);Helpersheet!BD2#<>"");1;1)

 

[CV12]

Thank you Fluff

 

[Fluff]

You're welcome & thanks for the feedback