There are three investment strategies to choose from: Lowest share, Rebalance portfolio, Equal invest.
Lowest share invests in the current lowest weighted share in your pool of assets. This allows you to balance your portfolio without need to buy multiple shares. This is recommended for most users.
Rebalance portfolio invests by rebalancing your pool of assets to a specific percentage that you determined in your target portfolio. This allows you to rebalance as accurately as possible without selling shares. This option is recommended for larger investment amounts and may incur additional brokerage fees.
Equal invest invests equally across all shares within your pool. This allows you to invest in all assets within your portfolio equally. This option is recommended for advanced investors and may incur additional brokerage fees.