Why Can't use or call some indicator?

This topic has 9 replies, 2 voices, and was last updated 7 years ago by Francesco.

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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;

<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:

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?
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

c = Close
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

//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 🙂

//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"

//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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