Stop cell reference changing when insert column

Hi Guys,

Probabilly really simple,

I have referenced data in two colums on a sheet A and B,

Column A contains the latest data, each month i insert new column (moving column A to column B)

However all of my references continue to follow the original data (eg will change from column A to column B)

this happens despite using Absolute references. (=$A$1)

Is there a way to lock these cell references to only ever display column A etc?