Remember that in the previous (3) series one could choose between Lots, Percent or Risk.
In this new version we use 'Percent', behind the scenes.
It is set to 5 percent of free margin is Lot size. (Only the Shark pattern uses 3.5%)
This was tested on an account with leverage of 100.
This lot size was chosen to keep the DD to a minimum when a pattern fails and hits the SL.
The EA automatically adjusts this percentage according to account leverage, meaning that if your account leverage is 200, which is twice as big as on the tested account, the lot size will be 5% * 100/200 = 2.5% of free margin.
I recommend that anyone who uses HT ULTIMATE, does a short test run in the Strategy Tester of the account he/she is going to let it trade on.
By doing this, you can see if the lot size is OK.
If you find that the lot size too big or small for your likings , you can adjust it with the setting 'Lot Size Adjust', with a scale from -99% to +100%
So in short, the lot size increases as your account grows.