The indicator shows vertexes of three zigzags.
The indicator is described in The Folding Rule by Viktor Likhovidov article in Stock & Commodities in June, 2001 issue.
Download:
MT4/MQ4 version
viewtopic.php?f=38&t=64369
and
viewtopic.php?f=38&t=65061&p=114722#p114722
The indicator was revised and updated