At the moment you have one early bird discount and one late booking fee. In our set up we like to start with a base price and increase 5-6 times after a month to encourage participants to register as early as possible. This 5-6 increases should be flexible so you could add 1-n of those. They should have a date from when they start (like the actual one) they should have a discount / increase in Value / Percent and maybe also Voucher (like the actual one) the should have a Name like Early bird discount and Late Booking Fee but as they are now flexible it should be configured how they are named.