Converting the formula into an Array google Sheet

Question

Converting the below formula into an Array but its displaying the same result till last row can someone please resolve the bug.

=ARRAYFORMULA({"Stock";IF(B5:B="",, INDEX('Stock In by Invoices'!$J$5:$J,MATCH(1,('Stock In by Invoices'!$E$5:$E=C5:C) ('Stock In by Invoices'!$F$5:$F=D5:D) ('Stock In by Invoices'!$G$5:$G=E5:E),0)))})

Answer 1

Try

=ARRAYFORMULA({"Stock";IF(A2:A="",, VLOOKUP(A2:A&B2:B&C2:C, {Stock!$A$2:$A&Stock!$B$2:$B&Stock!$C$2:$C, Stock!$D$2:$D}, 2, 0))})

and see if that works?