Using a variable in the screener ?

bewoke2 · 2019-05-07T09:05:51+00:00

Hello Folks ! Is it possible to use a variable in a screener ? let say for example I want to find gappers, my code will be something like: myGap = close[1]/open[0] if myGap > X then myResult = 1 else myResult = 0 endif screener(myResult) So when I launch my screener, I may use X as input (X = 1.1 for example for a gap of 10%), is this kind of manoeuvre possible with PRT ? Thanks !

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05/07/2019 at 10:05 AM #97826 quote
bewoke2
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Hello Folks !

Is it possible to use a variable in a screener ? let say for example I want to find gappers, my code will be something like:
```
myGap = close[1]/open[0]

if myGap > X then
myResult = 1
else
myResult = 0
endif

screener(myResult)
```
So when I launch my screener, I may use X as input (X = 1.1 for example for a gap of 10%), is this kind of manoeuvre possible with PRT ?
Thanks !
05/07/2019 at 10:59 AM #97829 quote
robertogozzi
Moderator

Legend
Yes.

Replace last line with:
```
screener[myResult]
```
05/07/2019 at 11:26 AM #97833 quote

Vonasi
Moderator

Master

bewoke2– Please always use the ‘Insert PRT Code’ button when posting any code as it makes it far more readable for everyone else. I have tidied up your post for you 🙂

bewoke2 thanked this post

05/08/2019 at 12:26 PM #97933 quote
bewoke2
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It didn’t do quite as I want ! I think I wasn’t clear enough.
Here is how “exactly” my code will like.
```
myRSI = 0

if Rsi[14](close) > X then
myRSI = 1
else
myRSI = 0
endif

SCREENER(myRSI)
```
So when I run the scanner, I should be able to input the variable “X” (65, 70, or 80…), it’s like having a global scanner for an RSI above a certain value.
It is like making a function in C code which takes an input from the user before displaying the result.

But now, I get “X” is not defined (which is true)

Thanks!
05/08/2019 at 1:40 PM #97951 quote

Vonasi
Moderator

Master

It is not possible to have externally adjustable variables in a screener. You will need to manually modify the screener to change the value or set up multiple screeners one for each chosen value.

bewoke2 thanked this post

05/08/2019 at 1:41 PM #97952 quote
robertogozzi
Moderator

Legend
First, replace the last line with:
```
screener[myResult]
```
Then you will have to hard code X inside the code; screeners and strategies do not allow users to change data (only indicators can).

bewoke2 thanked this post
05/08/2019 at 2:04 PM #97959 quote

bewoke2
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Average

Thanks ! resolved.
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