COUNT and SKIP can be used for paging through transactions. Using a very large count value may cause the node to perform the request slowly, and so it is recommended to never use a COUNT that is more than 100. SKIP is used to skip the first number of results. It is not recommended to rely only on this for the accounting of an exchange. It is possible that while you are iterating to discover the full transaction list, that someone sends a transaction to the wallet that will be missed. Also, this method includes UNCONFIRMED transactions and must be used with caution.