Working with the demonic is important but the energy work through sigils should be done without a circle around the sigil. That circle is an attempt to dominate the Goetia spirits, other spirits and Gods. A black magician doesn’t need it as because blackmagicians and witches are attuned to the Qliphot
So just trace the sigil without circle if you are LHP*:
Chao ab Ordo!
*LHP = left hand path