How to automate the process to post the FX difference during reconciliation

Summary:

The rate applied during original transactions and the rate applied by banks in bank statements differ and hence there is difference in the amounts during reconciliation. How to automatically create a transaction for this difference during reconciliation if the difference is beyond the threshold limit provide in tolerance rules?

Content (required):

The rate applied during original transactions and the rate applied by banks in bank statements differ and hence there is difference in the amounts during manual reconciliation. How to automatically create a transaction for this difference during reconciliation if the difference is beyond the threshold limit provide in tolerance rules? Is there a setup to handle this?