Green/Red Bar Counts - usage example of indie.MutSeries[T] generic class

A few days ago the we have released an update to Indie language 4.1, so now it has a generic series types: indie.Series[T] and indie.MutSeries[T]. Old types indie.SeriesF and indie.MutSeriesF are still there, they are nothing but aliases for indie.Series[float] and indie.MutSeries[float] correspondingly.

The `Green/Red Bar Counts` indicator demonstrates the usage of new generic class inide.MutSeries[T], which is instantiated with T as int type. The generic type parameter T can be of any (well, almost) Indie type, e.g. bool, str, etc.