We get the swastika pose when both the palms in pataka are crossed at the wrists.

lets take a look at the viniyoga shloka: (uses)
sammuhagamane tunda darshane shankha purane
anganam motane shakhonamane cha niyujyate
The shloka says that swastika denotes a Crocodile
My imagination says it can be used
To say “No”
To show a blocked road or a passage
To [...]