How to convert the following ThinkScript to EasyLanguage?

====
def EI = ZigZagHighLow("price h" = high, "price l" = low, "percentage reversal" = .01, "absolute reversal" = .05, "atr length" = 5, "atr reversal" = 2.0);
def EISave = if !IsNaN(EI) then EI else GetValue(EISave, 1);
def chg = (if EISave == high then high else low) - GetValue(EISave, 1);
def isUp = chg >= 0;
def EIL = if !IsNaN(EI) and !isUp then low else GetValue(EIL, 1);
def EIH = if !IsNaN(EI) and isUp then high else GetValue(EIH, 1);
def dir = if EIL != EIL[1] or low == EIL[1] and low == EISave then 1 else if EIH != EIH[1] or high == EIH[1] and high == EISave then -1 else dir[1] ;
def signal = if dir > 0 and low > EIL then if signal[1] <= 0 then 1 else signal[1] else if dir < 0 and high < EIH then if signal[1] >= 0 then -1 else signal[1] else signal[1];
plot upArrow = signal > 0 and signal[1] <= 0;
upArrow.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);
plot downArrow = signal < 0 and signal[1] >= 0;
downArrow.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);

===
The big problem is ZigZagHighLow, I guess. I see the code for EasyLanguage zigzag code here at traders.com/Documentation/FEEDbk_docs/2019/03/TradersTips.html

but, I cant put together. Any pointer would be highly appreciated.. Thanks!

Well, I see the zigzag code as posted in the previous URL, but I cant plug that into a strategy/indicator.. basically buy and sell points should be identified in zigzag code. Thanks!