Solo does not use a separate tiered notional volume rule. Position size is limited by the margin required to hold the position at the account's 1:33 leverage.
Because the limit is a margin limit, it applies at order entry. If the free margin on the account is not sufficient for the position, the position cannot be opened. There is no separate notional volume strike and no notional volume Reward Payment reduction on Solo.
Related Terms: LaunchPad product terms (pending)