i cant get it to work either, but it did a few days ago.
maybe I can post the source code? I think I downloaded it.
the darvas box requires you to change states in the algorithm only one time frame per state. so first you set a upper box, then a lower box then you ask whether you should change them.
then it asks if you should buy or sell. until the lower box is established you can not sell, and until the lower box is breached, you cannot sell. darvas sets the clock cycles to days, zeev to minutes