# Need help with simple code.

#### fungus12

##### Member
Hi. I'm trying to get this simple idea coded and I'm not sure what I'm doing wrong. The indicator is the IFT_Stoch that comes with thinkorswim. What I want to have happen is an arrow appear whenever the IFT and the Stoch are equal. Here's the code:

Code:
``````#
# TD Ameritrade IP Company, Inc. (c) 2012-2022
#

declare lower;

input price = close;
input length = 30;
input slowingLength = 5;
input over_bought = 60;
input over_sold = 30;

def rainbow = reference RainbowAverage(price = price, averageType = AverageType.WEIGHTED);
plot Stochastic = Sum(rainbow - Lowest(rainbow, length), slowingLength) / (Sum(Highest(rainbow, length) - Lowest(rainbow, length), slowingLength) + 0.0001) * 100;

def normStochRainbow = 0.1 * (Stochastic - 50);
plot IFT = 100 / (1 + Exp(-2 * normStochRainbow));
plot OverBought = over_bought;
plot OverSold = over_sold;

Stochastic.SetDefaultColor(GetColor(1));
IFT.SetDefaultColor(GetColor(2));
OverBought.SetDefaultColor(GetColor(5));
OverSold.SetDefaultColor(GetColor(5));

#my code ------------------------------
plot down = if Stochastic >= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);``````

The issue is that it seems to be working when the IFT and Stoch are above the overbought line but not when they're below that. No idea why that's happening. Any help would be appreciated.

Solution
Try something like this. I didn't test it though.

Ruby:
``````plot down = if Stochastic > overbought and Stochastic <= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
plot up   = if Stochastic < OverSold and Stochastic >= IFT then IFT else Double.NaN;
up.SetPaintingStrategy(PaintingStrategy.ARROW_UP);``````
Try something like this. I didn't test it though.

Ruby:
``````plot down = if Stochastic > overbought and Stochastic <= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
plot up   = if Stochastic < OverSold and Stochastic >= IFT then IFT else Double.NaN;
up.SetPaintingStrategy(PaintingStrategy.ARROW_UP);``````

Hi. I'm trying to get this simple idea coded and I'm not sure what I'm doing wrong. The indicator is the IFT_Stoch that comes with thinkorswim. What I want to have happen is an arrow appear whenever the IFT and the Stoch are equal. Here's the code:

Code:
``````#
# TD Ameritrade IP Company, Inc. (c) 2012-2022
#

declare lower;

input price = close;
input length = 30;
input slowingLength = 5;
input over_bought = 60;
input over_sold = 30;

def rainbow = reference RainbowAverage(price = price, averageType = AverageType.WEIGHTED);
plot Stochastic = Sum(rainbow - Lowest(rainbow, length), slowingLength) / (Sum(Highest(rainbow, length) - Lowest(rainbow, length), slowingLength) + 0.0001) * 100;

def normStochRainbow = 0.1 * (Stochastic - 50);
plot IFT = 100 / (1 + Exp(-2 * normStochRainbow));
plot OverBought = over_bought;
plot OverSold = over_sold;

Stochastic.SetDefaultColor(GetColor(1));
IFT.SetDefaultColor(GetColor(2));
OverBought.SetDefaultColor(GetColor(5));
OverSold.SetDefaultColor(GetColor(5));

#my code ------------------------------
plot down = if Stochastic >= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);``````

The issue is that it seems to be working when the IFT and Stoch are above the overbought line but not when they're below that. No idea why that's happening. Any help would be appreciated.

2 variables are rarely the same. so to check when they are equal may miss some desired conditions.
might be better to check the difference of the 2, and compare that to a small number or %.
could check for a crossing, but that might not happen.

Code:
``````#replace a and b with desired formules.
def a = ...
def b = ...
input near_percent = 0.4;
def diff = absvalue(a-b);
def per = (100 * diff/a);
def near = per <= near_percent;
plot down = if near then high else double.nan;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
#``````

Try something like this. I didn't test it though.

Ruby:
``````plot down = if Stochastic > overbought and Stochastic <= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
plot up   = if Stochastic < OverSold and Stochastic >= IFT then IFT else Double.NaN;
up.SetPaintingStrategy(PaintingStrategy.ARROW_UP);``````
That didn't quite work. It's now just creating arrows whenever both are above OS or OB, rather than only when they're equal. However, what's interesting is that when they ARE equal, arrows are not displayed in both areas. So maybe doing the inverse of that code would fix it?

EDIT: yep that seemed to do it. Changing the equal-to operators in both lines did the trick. Thanks a lot!

2 variables are rarely the same. so to check when they are equal may miss some desired conditions.
might be better to check the difference of the 2, and compare that to a small number or %.
could check for a crossing, but that might not happen.

Code:
``````#replace a and b with desired formules.
def a = ...
def b = ...
input near_percent = 0.4;
def diff = absvalue(a-b);
def per = (100 * diff/a);
def near = per <= near_percent;
plot down = if near then high else double.nan;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
#``````
I'm not sure I follow. The two variables are the same often enough so I feel like it's fine to have that as my parameter. For instance, in the code I listed in my original post, there were several instances of them being equal showcased by an arrow. But the issue was that for some reason this would only work when they were equal in the Overbought area. For some reason when they became equal in the Oversold area, the arrows were just spammed throughout all bars. So the code I listed beforehand.
In regard to the code you posted, it seems like it just checks for it to be "close enough".

EDIT: problem solved. Here's the working code to those interested:

Code:
``````#
# TD Ameritrade IP Company, Inc. (c) 2012-2022
#

declare lower;

input price = close;
input length = 30;
input slowingLength = 5;
input over_bought = 60;
input over_sold = 30;

def rainbow = reference RainbowAverage(price = price, averageType = AverageType.WEIGHTED);
plot Stochastic = Sum(rainbow - Lowest(rainbow, length), slowingLength) / (Sum(Highest(rainbow, length) - Lowest(rainbow, length), slowingLength) + 0.0001) * 100;

def normStochRainbow = 0.1 * (Stochastic - 50);
plot IFT = 100 / (1 + Exp(-2 * normStochRainbow));
plot OverBought = over_bought;
plot OverSold = over_sold;

Stochastic.SetDefaultColor(GetColor(1));
IFT.SetDefaultColor(GetColor(2));
OverBought.SetDefaultColor(GetColor(5));
OverSold.SetDefaultColor(GetColor(5));

#my code ------------------------------
plot down = if Stochastic > overbought and Stochastic >= IFT then IFT else Double.NaN;
down.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);
plot up   = if Stochastic < OverSold and Stochastic <= IFT then IFT else Double.NaN;
up.SetPaintingStrategy(PaintingStrategy.ARROW_UP);``````

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