If you have a deal security price that is less than two decimals (e.g. $0.006), please note that rounding will be applied to half a cent for calculation of purchase amount so that payment methods can be charged and the investment can be funded.
As such we recommend setting a price per bundled unit of securities to avoid this issue and increase your average purchase price (e.g. Units of 10 $0.006 shares at $0.06).
We would also recommend using our preset purchase price functionality to a dollar amount that creates an even bundle of securities.