Trouble

@cjdsellers - does this relate to previously created issue #726 ?

Might this follow a "garbage collection" pattern? Would it be possible to observe subscriptions within the data engine coming from indicators and actors for active references, to understand what the...

@andrewcz - I was thinking about adding some IBKR tests as well, but I don't want to re-cover any cases you've already implemented. Are there any cases I could help...