The running balance includes all reconciled transactions, as well as any unreconciled Spend Money and Receive Money transactions. Now you get the full picture of your cash position based on future transactions.When the balance is greyed out, it indicates the transaction is in the future.
Future dated transactions do not affect your “Balance", which always show as at today’s date. However, it is helpful to see what spending is coming up, like a batch payment that is going to be paid in a few days time for example. Note that the Running Balance will only show when the page is sorted by date (which is the default).
I trust this will be helpful and give you a clear indication to your question of "running balance".