Mudra is number 5 is a window for wisdom.

As producing mental work, and activating mental activity, as cure blood circulation destroys, strokes, sclerosis for vessels of cerebral brain.
As a big finger of pillow is takes middle phalanger,second joint of nameless finger is on the top, and other fingers are free strengthened.And free fingers of elements Fire, earth, water, closed a finger for element metall. And doing on the moon days of active elements fire are 13,3, 23, earth are 5,15, 25, and water are 9,19, 29, and on the days of passive element as metall.