Scan using Heiken Ashi candle and WilliamsPercentR

If not for the Heiken-Ashi candles we could build this using the Condition Wizard. The first step is to build the Heiken-Ashi candles for the scan. For that I will simply steal some code from a previous solution:

https://www.hahn-tech.com/ans/two-consecutive-green-heikin-ashi-candles/

Then we combine the first several lines from that solution with the code from Thinkorswim for the WilliamsPercentR. Last few lines contain your scan signals:

input length = 10;
def highestHigh = Highest(high, length);
def lowestLow = Lowest(low, length);
def result = if highestHigh == lowestLow then -100 else (highestHigh - close) / (highestHigh - lowestLow) * (-100);
def williamsPercentR = if result > 0 then 0 else result;
def haClose = ohlc4;
def haOpen = if haOpen[1] == 0 then haClose[1] else (haOpen[1] + haClose[1]) / 2;
def haHigh = Max(high, Max(haClose, haOpen));
def haLow = Min(low, Min(haClose, haOpen));
# first scan signal
plot scan = high < high[1] and williamsPercentR > williamsPercentR[1];
# second scan signal
#plot scan = low > low[1] and williamsPercentR < williamsPercentR[1];