Setting a cash reserve is completely optional. Investors utilizing Auto Invest or Recurring Order can choose to set aside a percentage of their portfolio in cash, as a cash reserve. By doing so, Auto Invest or Recurring Order, as applicable, will only use funds in excess of your cash reserve to place orders, and will not place orders until this cash reserve level is met. You can change your cash reserve at any time by either adjusting the percentage of cash in your target allocation if you are using Auto Invest, or by selecting “Yes” to the “Cash Reserve” option in the Recurring Order setup page.