Bollinger Previous Days

• 12/01/2021 at 10:50 AM #182577
  albertox

  Hi all,

  I’m trying to refer to the value of a Bollinger Band from previous days however, my condition does not seem to apply correctly.

  For instance, what would be the value of the lower Bollinger Band 2 days ago?

  I’m trying the following with no success: BollingerDown[20](Close[2]) or BollingerDown[20](Close)[2]

  Thanks a lot!

  

  albertox

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  12/01/2021 at 11:13 AM #182582
  robertogozzi

  Try defining and using MyBB[n]:

  MyBB = BollingerDown[20](Close) IF MyBB[2] THEN . . ENDIF

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  MyBB = BollingerDown[20](Close) IF MyBB[2] THEN . . ENDIF

  

  robertogozzi

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  12/01/2021 at 11:40 AM #182585
  albertox

  BBInf = BollingerDown[20](close) c1 = DHigh(1) <= BBInf[1]*1.015 SCREENER [c1]

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  BBInf = BollingerDown[20](close)   c1 = DHigh(1) <= BBInf[1]*1.015   SCREENER [c1]

  Hi Roberto,

   

  Thanks a lot for your swift response.

   

  I tried your suggestion as per the example attached however it is still not working properly.

  For example, there is a stock where yesterday’s High is 21.780 and yesterday’s lower Bollinger Band is 21.244

  I want the condition to be true if  yesterday’s High is equal or less than yesterday’s lower Bollinger Band plus 1.5%.

  For this stock, the result of this condition would be False (21.244 * 1.015 = 21.563) however, the Proscreener is still showing it up.

   

  Any thoughts on this? Grazie mille!

   

  Alberto

  

  albertox

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  12/01/2021 at 12:48 PM #182596
  robertogozzi

  Beacuse you are comparing different TFs.

  That’s because (1) with DHIGH means that you get yesterdays’s DAILY high and you compare it with BBInf[1] wichi is not yesterday’s BB (unless you are using the Daily TF, in which case you can use HIGH[1] instead of DHIGH(1)), but the value of the BB on the previous candle. If you use it on a 1-hour TF, DHIGH is correct, but BBInf[1] is the value of the previous hour.

  In addition, check that you do not reference more than 254 bars, which is the current limit with IG (1024 with PRT). So, if you are using a 1-minute TF, you won’t be able to make it work because you will need 1024 bars for today (maybe half of them at 12pm) + 1024 for the whole previous day, which are quite too many.

   

   

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  albertox

  

  robertogozzi

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  12/01/2021 at 1:02 PM #182599
  albertox

  Thanks Roberto, my intention here is to do everything with Daily timeframe. So compare yesterday’s daily high, with yesterday’s lower bollinger band on the daily candle.

  As per your example, I have simplified the reference to yesterday’s High, but still not been able to get it right. (I also tried introducing Timeframe(Daily) at the very beginning to force everything to be on daily basis but didnt work either.

  BBInf = BollingerDown[20](close) c1 = High[1] <= BBInf[1]*1.015 SCREENER(c1)

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  BBInf = BollingerDown[20](close)   c1 = High[1] <= BBInf[1]*1.015   SCREENER(c1)

  Also, Im not referencing to any previous days, so the 1024 limit should not affect.

   

  Thanks!

   

  

  albertox

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  12/01/2021 at 4:18 PM #182623
  robertogozzi

  Replace the last line with:

  SCREENER[c1]

  1	SCREENER[c1]

  

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  12/01/2021 at 4:20 PM #182624
  albertox

  That was just a typo when re-writing the code here, it is correct on ProScreener.

  

  albertox

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  12/01/2021 at 4:34 PM #182627
  JC_Bywan

  Real time subscription? Or free “end of day” account?

  

  JC_Bywan

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  12/01/2021 at 4:39 PM #182628
  albertox

  Real Time, Premium account.

  

  albertox

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  12/01/2021 at 5:06 PM #182634
  robertogozzi

  It works finely for me.

  Is it possible that you typed * 1.015, instead of 0.985?

  

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  12/02/2021 at 12:05 PM #182706
  albertox

  I just found out that my code is providing somewhat random (wrong) results, only when combining lists of different markets.

  When selecting only Spain for instance, it seems to be working fine.

  PRT told me they where experiencing some issues with american stocks so perhaps this is affecting proscreener.

  Thanks to all for your kind attention.

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  robertogozzi

  

  albertox

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  12/02/2021 at 12:37 PM #182708
  robertogozzi

  Thank you for letting us know about this issue 🙂

   

  

  robertogozzi

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