Sma-Ema Crossover - usage example of indie.Var[T]

With the recent update to Indie language 4.3, we've introduced the indie.Var[T] container. This new container type functions similarly to indie.MutSeries[T], but it has a single-value history depth, making it ideal for storing and updating the current state without accumulating historical values.

The "Sma-Ema Crossover" indicator showcases indie.Var[T] by using it to detect and retain values on specific crossover events.