Why Can't use or call some indicator?

• 05/07/2017 at 12:52 PM #34756
  Francesco

  Hallo to all,

  I tried to write a simple screener using Schaff Trend Cycle Indicator, but when I try to build it, platform says “Selected indicator Is not available in ProBuilder Language. Select another indicator.”

  But STC is a built-in ProRealTime 10.3 indicator.

  I tried also to…

  Call “Schaff Trend Cycle”[10,23,50]

  But the result is the same.

  What’s the problem?

  

  Francesco

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  05/08/2017 at 9:12 AM #34806
  Nicolas

  Some indicators can’t be used in “Simplified creation”, they need to be recoded into the screener directly.

  I found the Schaff trend cycle codes in these 2 posts: https://www.prorealcode.com/prorealtime-indicators/schaff-trend-cycle/

  and there: https://www.prorealcode.com/topic/dax-intraday-scalping-strategy/

  

  Nicolas

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  05/10/2017 at 7:52 AM #34998
  Francesco

  Thank you for your answer Nicolas.

  I had already found indicators that You mention, but both of them draw a different graphic compared of Schaff Trend Cycle that comes with Prorelatime 10.3.

  I asked to Prorealtime support service and I’m waiting for an answer.

  However, in the meantime I found an interesting article here: http://traders.com/Documentation/FEEDbk_docs/2010/04/close.html

  In the article, the calculation method of STC is explained like this:

  *** Code Start ***

  <strong>SCHAFF TREND CYCLE EASYLANGUAGE CODE</strong> Inputs: TCLen (10), MA1 (23), MA2 (50); Plot1(_SchaffTC(TCLen,MA1,MA2), "Schaff_TLC"); Plot2(25); Plot3 (75); Inputs: TCLen(NumericSimple), MA1(NumericSimple), MA2 (NumericSimple); Variables: XMAC(0), Frac1(0), PF(0), PFF(0), Frac2(0), Factor(.5); {Calculate a MACD Line} XMAC=MACD (c,MA1,MA2); {1st Stochastic: Calculate Stochastic of a MACD} Value1=Lowest (XMAC,TCLen); Value2=Highest (XMAC,TCLen) - Value1; {%Fast K of MACD} Frac1=IFF(Value2 > 0, ((XMAC-Value1)/Value2) * 100,Frac1[1]); {Smoothed Calculation for % Fast D of MACD} PF=IFF(CurrentBar <=1,Frac1,PF[1]+ (Factor * (Frac1-PF[1]))); {2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3=Lowest(PF,TCLen); Value4=Highest(PF,TCLen)-Value3; {% of Fast K of PF} FRAC2=IFF(Value4 > 0,((PF - Value3)/Value4) * 100,Frac2[1]); {Smoothed Calculation for %Fast D of PF} PFF=IFF(CurrentBar<=1,Frac2,PFF[1]+(Factor * (Frac2-PFF[1]))); {The STC Function is the % Fast D of PF} _SchaffTC=PFF;

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  <strong>SCHAFF TREND CYCLE EASYLANGUAGE CODE</strong> Inputs: TCLen (10), MA1 (23), MA2 (50); Plot1(_SchaffTC(TCLen,MA1,MA2), "Schaff_TLC"); Plot2(25); Plot3 (75); Inputs: TCLen(NumericSimple), MA1(NumericSimple), MA2 (NumericSimple); Variables: XMAC(0), Frac1(0), PF(0), PFF(0), Frac2(0), Factor(.5); {Calculate a MACD Line} XMAC=MACD (c,MA1,MA2); {1st Stochastic: Calculate Stochastic of a MACD} Value1=Lowest (XMAC,TCLen); Value2=Highest (XMAC,TCLen) - Value1; {%Fast K of MACD} Frac1=IFF(Value2 > 0, ((XMAC-Value1)/Value2) * 100,Frac1[1]); {Smoothed Calculation for % Fast D of MACD} PF=IFF(CurrentBar <=1,Frac1,PF[1]+ (Factor * (Frac1-PF[1]))); {2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3=Lowest(PF,TCLen); Value4=Highest(PF,TCLen)-Value3; {% of Fast K of PF} FRAC2=IFF(Value4 > 0,((PF - Value3)/Value4) * 100,Frac2[1]); {Smoothed Calculation for %Fast D of PF} PFF=IFF(CurrentBar<=1,Frac2,PFF[1]+(Factor * (Frac2-PFF[1]))); {The STC Function is the % Fast D of PF} _SchaffTC=PFF;

  *** Code end ***

  I tried to translate it, but I have 2 problems:

  1. In this formula: XMAC=MACD (c,MA1,MA2), the parameter c is not documented. It seems to be the cycle, but what is its default value?
  2. CurrentBar is a value that must be present in ProBuilder also. Maybe is it BarIndex?

  Thanks.

  

  Francesco

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  05/10/2017 at 8:43 AM #35003
  Nicolas

  1. c = Close
  2. Yes you can translate this instruction with “BarIndex” in Probuilder

  

  Nicolas

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  05/10/2017 at 9:15 AM #35009
  Francesco

  Thanks.

  

  Francesco

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  05/10/2017 at 9:55 AM #35019
  Francesco

  I translated the code, but my indicator plots nothing and I can’t find the error.

  //input parameters TCLen = 10 MA1 = 23 MA2 = 50 Once Factor = 0.5 //{Calculate a MACD Line} XMAC = ExponentialAverage[MA1](Close) - ExponentialAverage[MA2](Close) //{1st Stochastic: Calculate Stochastic of a MACD} Value1 = Lowest[TCLen](XMAC) Value2 = Highest[TCLen](XMAC) - Value1 //{%Fast K of MACD} if Value2 > 0 then Frac1 = ((XMAC - Value1)/Value2) * 100 else Frac1 = Frac1[1] endif //{Smoothed Calculation for % Fast D of MACD} if BarIndex <=1 then PF = Frac1 else PF = PF[1] + (Factor * (Frac1 - PF[1])) endif //{2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3 = Lowest[TCLen](PF) Value4 = Highest[TCLen](PF) - Value3 //{% of Fast K of PF} if Value4 > 0 then Frac2 = ((PF - Value3)/Value4) * 100 else Frac2 = Frac2[1] endif //{Smoothed Calculation for %Fast D of PF} if BarIndex <= 1 then PFF = Frac2 else PFF = PFF[1] + (Factor * (Frac2 - PFF[1])) endif //return PFF RETURN PFF

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  //input parameters TCLen = 10 MA1 = 23 MA2 = 50   Once Factor = 0.5   //{Calculate a MACD Line} XMAC = ExponentialAverage[MA1](Close) - ExponentialAverage[MA2](Close)   //{1st Stochastic: Calculate Stochastic of a MACD} Value1 = Lowest[TCLen](XMAC) Value2 = Highest[TCLen](XMAC) - Value1   //{%Fast K of MACD} if Value2 > 0 then Frac1 =  ((XMAC - Value1)/Value2) * 100 else Frac1 = Frac1[1] endif   //{Smoothed Calculation for % Fast D of MACD} if BarIndex <=1 then PF = Frac1 else PF = PF[1] + (Factor * (Frac1 - PF[1])) endif   //{2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3 = Lowest[TCLen](PF) Value4 = Highest[TCLen](PF) - Value3   //{% of Fast K of PF} if Value4 > 0 then Frac2 = ((PF - Value3)/Value4) * 100 else Frac2 = Frac2[1] endif   //{Smoothed Calculation for %Fast D of PF} if BarIndex <= 1 then PFF = Frac2 else PFF = PFF[1] + (Factor * (Frac2 - PFF[1])) endif   //return PFF RETURN PFF

   

  

  Francesco

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  05/12/2017 at 9:28 PM #35367
  Nicolas

  I think you should embed the whole code into a condition that test if enough barindex has passed to completely calculate the longer moving average. Tell me if I’m not clear enough 🙂

  

  Nicolas

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  05/16/2017 at 4:53 PM #35720
  Francesco

  I reviewed code translation: “<=” operator needs to be inverted to “>=” on both code lines 24 and 42.

  The result is on the attached image: the first Schaff Trend Indicator is the ProRealTime built-in, the second “My Schaff Trend Cycle” is the translated indicator.

  Curves are a little bit different, but inversion points are the same.

  Now I can use it to build a screener.

  1 user thanked author for this post.

  Nicolas

  

  Francesco

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  08/03/2017 at 9:00 AM #42380
  Nicolas

  I made some improvements from you code @Francesco, thanks for taking the time to translate it. Now the indicator seems almost identical than the one of the platform. I certainly add your indicator to the library, since the code of the Schaff trend cycle is an often query in the forums 🙂

  Schaff Trend Cycle

  //input parameters TCLen = 10 MA1 = 23 MA2 = 50 Once Factor = 0.5 if barindex>MA2 then //{Calculate a MACD Line} XMAC = ExponentialAverage[MA1](Close) - ExponentialAverage[MA2](Close) //{1st Stochastic: Calculate Stochastic of a MACD} Value1 = Lowest[TCLen](XMAC) Value2 = Highest[TCLen](XMAC) - Value1 //{%Fast K of MACD} if Value2 > 0 then Frac1 = ((XMAC - Value1)/Value2) * 100 else Frac1 = Frac1[1] endif //{Smoothed Calculation for % Fast D of MACD} PF = PF[1] + (Factor * (Frac1 - PF[1])) //{2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3 = Lowest[TCLen](PF) Value4 = Highest[TCLen](PF) - Value3 //{% of Fast K of PF} if Value4 > 0 then Frac2 = ((PF - Value3)/Value4) * 100 else Frac2 = Frac2[1] endif //{Smoothed Calculation for %Fast D of PF} PFF = PFF[1] + (Factor * (Frac2 - PFF[1])) endif RETURN PFF, 75 coloured(0,0,255) as "level 75", 25 coloured(0,0,255) as "level 25"

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  //input parameters TCLen = 10 MA1 = 23 MA2 = 50   Once Factor = 0.5   if barindex>MA2 then //{Calculate a MACD Line} XMAC = ExponentialAverage[MA1](Close) - ExponentialAverage[MA2](Close)   //{1st Stochastic: Calculate Stochastic of a MACD} Value1 = Lowest[TCLen](XMAC) Value2 = Highest[TCLen](XMAC) - Value1   //{%Fast K of MACD} if Value2 > 0 then Frac1 =  ((XMAC - Value1)/Value2) * 100 else Frac1 = Frac1[1] endif   //{Smoothed Calculation for % Fast D of MACD} PF = PF[1] + (Factor * (Frac1 - PF[1]))   //{2nd Stochastic: DCalculate Stochastic of smoothed Percent Fast D, 'PF', above} Value3 = Lowest[TCLen](PF) Value4 = Highest[TCLen](PF) - Value3   //{% of Fast K of PF} if Value4 > 0 then Frac2 = ((PF - Value3)/Value4) * 100 else Frac2 = Frac2[1] endif   //{Smoothed Calculation for %Fast D of PF} PFF = PFF[1] + (Factor * (Frac2 - PFF[1])) endif   RETURN PFF, 75 coloured(0,0,255) as "level 75", 25 coloured(0,0,255) as "level 25"

  NOW IN LIBRARY : Schaff Trend Cycle 

  

  Nicolas

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  08/03/2017 at 11:07 PM #42454
  Francesco

  Thanks Nicolas.

  

  Francesco

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