Thinkscript Question about subroutines

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Hello,

I have a piece of code that repeats a lot and would like to make it into a subroutine but it doesn’t have a plot statement in it.  Is there a way to do this?

Here is the code

# Program to display label of EMA crossovers of 2 given parameters for short and long periods
# 1D, 1h, 30min, 15min, 5min, 1min

input shortPeriod = 5;
input longPeriod = 21;
#input averageType = AverageType.EXPONENTIAL;

def timeFrame = GetAggregationPeriod();

if timeFrame == AggregationPeriod.MIN {
def mavShort = ExpAverage(close(period = AggregationPeriod.MIN)[1], shortPeriod);
def mavLong = ExpAverage(close(period = AggregationPeriod.MIN)[1], longPeriod);
AddLabel(yes, “x1m”, if mavShort > mavLong then Color.GREEN else if mavShort == mavLong then Color.YELLOW else Color.RED);
} else

if timeFrame == AggregationPeriod.THREE_MIN {
def mavShort = ExpAverage(close(period = AggregationPeriod.THREE_MIN)[1], shortPeriod);
def mavLong = ExpAverage(close(period = AggregationPeriod.THREE_MIN)[1], longPeriod);
AddLabel(yes, “x3m”, if mavShort > mavLong then Color.GREEN else if mavShort == mavLong then Color.YELLOW else Color.RED);
} else etc..etc

 

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Posted by (Questions: 1, Answers: 1)
Asked on June 3, 2018 8:26 pm
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Subroutine, sounds like a term used in Visual Basic for Applications. Other programming languages refer to them as Functions, or Methods. Closest thing we have in Thinkscript is something the call a script: http://tlc.thinkorswim.com/center/reference/thinkScript/Reserved-Words/script.html

However, in the past I have found that there is a bug preventing these from working correctly when trying to apply secondary aggregation periods. I submitted a request to Thinkorswim support asking the to correct. But never bothered to follow up to see if they ever did.

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Posted by (Questions: 37, Answers: 4087)
Answered on June 3, 2018 9:35 pm
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Thanks for replying. I was trying to use script {} but that required that there were a Plot statement in it. I have not been able to find a way to create a function/method without this Plot statement ?

( at June 4, 2018 8:27 am)
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Ah, ok. Well there is no way to create a script without a plot statement. So you don’t need to keep trying to find a way around that. If it helps, the plot statement of a script does NOT display anything on the chart. It happens to be the return value of the script. It’s actually a function. Functions have return values. Data in and data out. The Plot statement of the script is how to get data out.

( at June 4, 2018 8:52 am)
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Recall in my original answer I mentioned there was a bug preventing the use of more than one secondary aggregation period on the same script.

I decided to go find the email where I submitted this bug report to Thinkscript support. Then I put together the original code I submitted to them so I could see if the bug had been fixed.

It is not. Still broken. Here I am providing the code and screenshots I originally submitted to Thinkscript support. This should save you a ton of wasted time trying to figure out why it won’t work.

script MyEMA {
#input data = close;
input length = 12;
input timeFrame = AggregationPeriod.FIVE_MIN;
def EMA = compoundValue(1, 2 / (length + 1) * close(period = timeFrame) + (length - 1) / (length + 1) * EMA[1],
Average(close(period = timeFrame), length));
plot MyEma = EMA;
}
#declare lower;
plot ema1 = MyEMA(21, AggregationPeriod.FIFTEEN_MIN);
plot ema2 = MyEMA(21, AggregationPeriod.HOUR);

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Posted by (Questions: 37, Answers: 4087)
Answered on June 4, 2018 9:18 am
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