Link to the community discussion (this page)
More technical description of the error in the existing code, possibly including the problematic code location if you have one.
Example of the correct vs error calculation including the data set used for both
If possible, a short test that could be used for reproducing the error.
as a guess - indicators are recognized and initialized within the strategy class, but not some object. therefore it is possible that all line written in the __init__ above are meaningless from the bt point of view.