Plot Only The FIRST Arrow In ThinkOrSwim

[apeck]

I am trying to code a indicator which plots an arrow if certain conditions are met but I am not sure how I only plot the arrow on the first candle that closes equal to or higher from previous candle and not plot any more arrows after that. Here is the code but it plots arrows every time the new candle goes higher than previous candle (I only want to plot on first candle that does that only). I also want to do this if current candle closes equal to or lower than previous candle only.

 

[SleepyZ]

I am trying to code a indicator which plots an arrow if certain conditions are met but I am not sure how I only plot the arrow on the first candle that closes equal to or higher from previous candle and not plot any more arrows after that. Here is the code but it plots arrows every time the new candle goes higher than previous candle (I only want to plot on first candle that does that only). I also want to do this if current candle closes equal to or lower than previous candle only.

Since you did not provide your code, here is an example that might help
Set input show_multiplearrows = yes; to no to hide the multiple arrows on the chart image
The large arrows remaining are the first arrow in each direction change

#need help removing extra arrows

input show_multiplearrows = yes;
def ema8  = ExpAverage(close, 8);
def ema21 = ExpAverage(close, 21);

#Multiple arrows in one direction
plot up = if show_multiplearrows and ema8 > ema21 then low else Double.NaN;
plot dn = if show_multiplearrows and ema8 < ema21 then high else Double.NaN;
up.SetPaintingStrategy(PaintingStrategy.ARROW_UP);
dn.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);

#One arrow in each direction until a reversal arrow in the opposite direction
def cond = if ema8 crosses above ema21 then 1 else if ema8 crosses below ema21 then -1 else cond[1];
plot arrowup = cond[1] != 1 and cond == 1;
arrowup.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);
arrowup.SetLineWeight(5);

plot arrowdn = cond[1] != -1 and cond == -1;
arrowdn.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
arrowdn.SetLineWeight(5);

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