Adjusting your account size is a way for the algorithm to provide an accurate position size (lot) for your trade.

You will need to do this every time before you start scanning through the watchlist and placing trades to apply proper risk management.

The value of the correct lot size for each trade will appear on the BFT Panel once you have input your account size, as seen in the screenshot below.

In this case, your lot size of each of 3 positions will be 0.01, and not 0.03.