It's MQL5 version of the indicator, published here: https://www.mql5.com/ru/code/9187.
The input parameter PERIOD is the value of the standard WPR indicator.
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/119
This is HILO IndicatorZigZagNN
The indicator shows recalculated ("broken") highs/lows of the standard ZigZag indicator.