I can offer this additional information:
The MACD indicator values I want access to are initialized here:
file: macd_indicator.dart
class: MacdIndicator
method: _initDataSource
fields: signalCollection, macdCollection, histogramCollection
Also, MACD indicator is a specific case of Technical Indicators. I am hoping for a general solution so that I may analyze any technical indicator.
Thank you for your continued efforts.
Jonny