Hi all. I'm struggling to implement a custom indicator in the research environment. When I try to add the indicator with "qb.Indicator", I get the following error (see notebook). What am I doing wrong here? I did my best to follow the tutorial linked below but am having trouble porting it to the research environment.

https://www.quantconnect.com/forum/discussion/3383/custom-indicator-in-python-algorithm/p1