Unfortunately you are working with one of the most limited 'pointer' PLCs. The only instruction available for 'pointers' is the Single Copy instruction.
Many variables in a PLC have a numeric component to their identification. For some the 'address' is directly related to the variable absolute location within the PLC's CPU memory structure. If the PLC accepts a 'pointer' it will be the actual address of a 'target variable' which is contained in another variable of a suitable size. (A variable capable of holding only one bit obviously would not be suitable as a pointer.) The 'target variable's' value would be read or modified by a suitable instruction which uses the 'pointer' variable. If you know the CPU's addressing structure then you may be able to calculate a proper pointer to another variable, possibly by incrementing but also by other suitable math.
Some blocks of variables are set aside and ONLY referenced by using a number to indicate their position within the block. The number may be literal, e.g. '5', or a variable containing a valid position. These blocks may be called 'arrays'. An array named 'stuff' which has 100 elements may have one of its elements accessed by 'stuff[23]' or by 'stuff[variable]' as long as the value in 'variable' is maintained within the bounds of the array. Attempting to access a location which would be outside the array may result in a serious error. In the case of arrays the value within [] is referred to as an index. It has the same idea as a pointer especially if the index is a variable. As a note, the Click's 'pointer' is closer to this concept of 'index' as all variables within the Click are automatically treated as being in arrays.
