Bruce, I see in an earlier post you've said:

So if you have color based on Net Change then a Condition Formula for a green Heiken-Ashi candle would be:

O + H + L + C > O1 + H1 + L1 + C1

And a Condition Formula for a red Heiken-Ashi candle would be:

O + H + L + C <= O1 + H1 + L1 + C1

However, in testing these two conditions, I find that both the green and the red Heiken-Ashi Candles with your formulas may or may not have a shadow above or below. 

My understanding of Heiken-Ashi signal candles is that Bullish Heiken-Ashi Signal Candles have no lower shadows. And, Bearish Heiken-Ashi Signal Candles have no upper shadows.

Can these formulas be modified to reflect the above signals?

Also, can you please create a Heiken-Ashi formula for candles that have both lower and upper shadows (Dojis-, Near-Dojis'-, or Spinning Top-type candles.)?

The formulas don't test for shadows, so there is no reason the formulas would correspond with shadows. The formulas test if the candle is red or green when color based on is set to Net Change (which is exactly what the quoted description of the formula indicates).

A condition formula for an HA candle with no upper shadow would be the following (you may want to get rid of the OR H = L at the end if you are just interested in if the candle is "bearish").

XAVGO3.1 + XAVGH3.1 + XAVGL3.1 + XAVGC3.1 >= 4 * H OR H = L

A condition formula for an HA candle with no lower shadow would be the following  (you may want to get rid of the OR H = L at the end if you are just interested in if the candle is "bulllish").

XAVGO3.1 + XAVGH3.1 + XAVGL3.1 + XAVGC3.1 <= 4 * L OR H = L

A condition formula for an HA candle with both an upper and lower shadow would be the following.

ABS((XAVGO3.1 + XAVGH3.1 + XAVGL3.1 + XAVGC3.1) / 2 - H - L) < H - L

And just for completeness, a condition formula for an HA candle without any shadows would be the following.

H = L

Hi Bruce: I would like a PCF that is +2 if:

                     heiken ashi low of current bar is above hull 21 of heiken ashi closes

                     heiken ashi high of current bar is higher than heiken ashi highs of previous two bars

                0 if only one condition is met and

                -2        if both conditions are not met.

Please try the following indicator formula.

SGN(XAVG(O1 + H1 + L1 + C1, 3) - HAVG(O + H + L + C, 21)) + SGN(GREATEST(4 * H, XAVG(O1 + H1 + L1 + C1, 3)) - MAX(GREATEST(4 * H1, XAVG(O2 + H2 + L2 + C2, 3)), 2))

Thank you. Great Job. But I think there is a missing ")" at the end.

Thanks. Copy and paste can be both a blessing and a curse. Still probably better with fewer mistakes than trying to manually type everything out though.