As detailed here, Novo won’t touch funds in any of your Reserves unless a purchase or withdrawal is greater than your Spendable Balance at the time. In this case, the Allocated Balance of your Reserves may be withdrawn in order to cover the transaction.
Ordering your Reserves tells us which Reserve to draw from in these scenarios. The higher you put a Reserve on the list, the sooner we’ll pull from it to cover excess transactions. If there’s a Reserve you really don’t want us to touch, order it as low as possible!
You can reorder your Reserves by heading to the Reserves section of your Novo account and pressing the “Reorder Reserves” button.