Just my two cents:
Certainly you do not intend to use up all available funds in your account to buy assets? It is essential to leave a buffer to allow for price fluctuations and avoid a margin call.
You can manually adjust the rolllong parameter until it accumulates to the figure you expect over a year. In your leverage 2 example, just divide rollong by two.
Last edited by Hredot; 12/11/17 13:37.