Two indicators Vanga are used. Fast and slow. Therefore there is no sense to establish identical length in settings.
If fast Vanga is higher than slow Vanga - UpTrend - lime color of a cloud
If fast Vanga is lower than slow Vanga - DownTrend - red color of a cloud
Thickness of a cloud prompts stability of a trend.
It is very similar to crossing of moving averages, however instead of moving averages Vanga is used. Vanga is much more useful than or .