I use below code to calculate the difference between two columns from remote tables but the output is all zero!
#+name: tbl1
| x |
| 1 |
| 2 |
| 3 |
#+name: tbl2
| y |
| 1 |
| 1 |
| 1 |
#+name: tbl3
| diff |
| 0 |
| 0 |
| 0 |
#+TBLFM: @2$1..@>$1=remote(tbl1,$1) - remote(tbl2,$1)