There are a few important things worth knowing about linked counters before you start using them:
This last point probably requires more detailed explanation.
As an example, say you have three counters, "A", "B", and "C". If you have counter "A" set to increment counter "B", and counter "B" set to increment counter "C", you cannot have counter "C" incrementing counter "A". Having the three counters linked in such a way could lead to a situation where incrementing counter "A" would increment counter "B", which would in turn increment counter "C", which would itself increment counter "A" again, and so on forever.