Background color for Heiken Ashi bars with no wick

We can take the code from a previous solution and add just a few lines to adapt it to a watchlist. Here is the link to the previous post where I am getting this code:

https://www.hahn-tech.com/ans/first-heikin-ashi-bullish-candlestick-with-no-lower-wick-after-2-or-more-red-candles/

Here is the solution. I pulled 6 lines of code from that previous solution and then added three lines to display a value in the watchlist column and dynamically adjust the color as you requested.

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));
def noLowerWickGreen = haClose > haOpen and haOpen == haLow;
def noUpperWickRed = haClose < haOpen and haOpen == haHigh;
plot data = if noLowerWickGreen then 1 else if noUpperWickRed then -1 else 0;
data.AssignValueColor(if data <> 0 then Color.BLACK else Color.CURRENT);
AssignBackgroundColor(if data > 0 then Color.GREEN else if data < 0 then Color.RED else Color.CURRENT);

Please note, that in that previous solution the request was for green HA candle with no lower wick and red HA candle with no or upper wick.

If you wanted to remove the requirement for the candle color you can modify two lines of that code as follows:

def noLowerWickGreen = haOpen == haLow and haOpen <> haHigh;
def noUpperWickRed = haOpen == haHigh and haOpen <> haLow;

Note that modifying these lines as shown above will match your specification exactly.