The declination of South Node (Ketu) is the inverse of North Node (Rahu), therefore, the only relevant pattern that we detected is that when declination was within -6 to +6 degrees the price was congested within narrow price zone as was previously mentioned at the North Node (Rahu) declination indicator.
Note: The South Node (Ketu) declination indicator is based on an ephemeris array that covers years 2010 to 2030, prior or after this years the data is not available, this daily ephemeris are based on UTC time so in order to align properly with the price bars times you should set UTC as your chart timezone.
But it should apply on all index related to rahu& ketu effect.
Like Nifty...