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Help requested for MESA MAMA FAMA indicator function


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Help requested for MESA MAMA FAMA indicator function

  #1 (permalink)
 gpw797 
Mesa, AZ
 
Posts: 55 since Oct 2010
I have been playing around with the MAMA FAMA indicator and want to try some strategy stuff but I don't have the programming skills to turn this into functions. Can somebody help with turning these into functions or point to place on the web for the functions? Code for indicators is below, thanks


 
Code 
{Ehlers MAMA and FAMA indicator - coded by dn
//// From Cybernetic Analysis for Stocks and Futures}

Inputs: Price((H+L)/2), FastLimit(.5),SlowLimit(.05); 

Vars: Smooth(0), Detrender(0),I1(0),Q1(0),jI(0),jQ(0),I2(0),Q2(0),Re(0), 
Im(0), Period(0),SmoothPeriod(0),Phase(0),DeltaPhase(0),alpha(0), 
MAMA(0),FAMA(0); 

If CurrentBar > 5 then begin 
Smooth = (4*Price + 3*Price[1] + 2*Price[2] + Price[3]) / 10; 
Detrender = (.0962*Smooth + .5769*Smooth[2] - .5769*Smooth[4] 
- .0962*Smooth[6])*(.075*Period[1] + .54); 

{Compute InPhase and Quadrature components} 
Q1 = (.0962*Detrender + .5769*Detrender[2] - .5769*Detrender[4] 
- .0962*Detrender[6])*(.075*Period[1] + .54); 
I1 = Detrender[3]; 

{Advance the phase of I1 and Q1 by 90 degrees} 
jI = (.0962*I1 + .5769*I1[2] - .5769*I1[4] 
- .0962*I1[6])*(.075*Period[1] + .54); 
jQ = (.0962*Q1 + .5769*Q1[2] - .5769*Q1[4] 
- .0962*Q1[6])*(.075*Period[1] + .54); 

{Phasor addition for 3-bar averaging)} 
I2 = I1 - jQ; 
Q2 = Q1 + jI; 

{Smooth the I and Q components before applying the discriminator} 
I2 = .2*I2 + .8*I2[1]; 
Q2 = .2*Q2 + .8*Q2[1]; 

{Homodyne Discriminator} 
Re = I2*I2[1] + Q2*Q2[1]; 
Im = I2*Q2[1] - Q2*I2[1]; 
Re = .2*Re + .8*Re[1]; 
Im = .2*Im + .8*Im[1]; 
If Im <> 0 and Re <> 0 then Period = 360/ArcTangent(Im/Re); 
If Period > 1.5*Period[1] then Period = 1.5*Period[1]; 
If Period < .67*Period[1] then Period = .67*Period[1]; 
If Period < 6 then Period = 6; 
If Period > 50 then Period = 50; 
Period = .2*Period + .8*Period[1]; 
SmoothPeriod = .33*Period + .67*SmoothPeriod[1]; 

If I1 <> 0 then Phase = (ArcTangent(Q1 / I1)); 
DeltaPhase = Phase[1] - Phase; 
If DeltaPhase < 1 then DeltaPhase = 1; 
alpha = FastLimit / DeltaPhase; 
If alpha < SlowLimit then alpha = SlowLimit; 
If alpha > FastLimit then alpha = FastLimit; 
MAMA = alpha*Price + (1 - alpha)*MAMA[1]; 
FAMA = .5*alpha*MAMA + (1 - .5*alpha)*FAMA[1]; 

Plot1(MAMA, "MAMA"); 
Plot2(FAMA, "FAMA"); 

End;

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  #3 (permalink)
 
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 cbritton 
Atlanta, Georgia
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Trading: ZN, ZB
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Try this:

function:
 
Code 
{Ehlers MAMA and FAMA indicator - coded by dn
//// From Cybernetic Analysis for Stocks and Futures}

Inputs: Price(NumericSeries), FastLimit(NumericSimple),SlowLimit(NumericSimple), MAMA(NumericRef), FAMA(NumericRef); 

Vars: Smooth(0), Detrender(0),I1(0),Q1(0),jI(0),jQ(0),I2(0),Q2(0),Re(0), 
Im(0), Period(0),SmoothPeriod(0),Phase(0),DeltaPhase(0),alpha(0), 
_MAMA(0),_FAMA(0); 

If CurrentBar > 5 then begin 
Smooth = (4*Price + 3*Price[1] + 2*Price[2] + Price[3]) / 10; 
Detrender = (.0962*Smooth + .5769*Smooth[2] - .5769*Smooth[4] 
- .0962*Smooth[6])*(.075*Period[1] + .54); 

{Compute InPhase and Quadrature components} 
Q1 = (.0962*Detrender + .5769*Detrender[2] - .5769*Detrender[4] 
- .0962*Detrender[6])*(.075*Period[1] + .54); 
I1 = Detrender[3]; 

{Advance the phase of I1 and Q1 by 90 degrees} 
jI = (.0962*I1 + .5769*I1[2] - .5769*I1[4] 
- .0962*I1[6])*(.075*Period[1] + .54); 
jQ = (.0962*Q1 + .5769*Q1[2] - .5769*Q1[4] 
- .0962*Q1[6])*(.075*Period[1] + .54); 

{Phasor addition for 3-bar averaging)} 
I2 = I1 - jQ; 
Q2 = Q1 + jI; 

{Smooth the I and Q components before applying the discriminator} 
I2 = .2*I2 + .8*I2[1]; 
Q2 = .2*Q2 + .8*Q2[1]; 

{Homodyne Discriminator} 
Re = I2*I2[1] + Q2*Q2[1]; 
Im = I2*Q2[1] - Q2*I2[1]; 
Re = .2*Re + .8*Re[1]; 
Im = .2*Im + .8*Im[1]; 
If Im <> 0 and Re <> 0 then Period = 360/ArcTangent(Im/Re); 
If Period > 1.5*Period[1] then Period = 1.5*Period[1]; 
If Period < .67*Period[1] then Period = .67*Period[1]; 
If Period < 6 then Period = 6; 
If Period > 50 then Period = 50; 
Period = .2*Period + .8*Period[1]; 
SmoothPeriod = .33*Period + .67*SmoothPeriod[1]; 

If I1 <> 0 then Phase = (ArcTangent(Q1 / I1)); 
DeltaPhase = Phase[1] - Phase; 
If DeltaPhase < 1 then DeltaPhase = 1; 
alpha = FastLimit / DeltaPhase; 
If alpha < SlowLimit then alpha = SlowLimit; 
If alpha > FastLimit then alpha = FastLimit; 
_MAMA = alpha*Price + (1 - alpha)*_MAMA[1]; 
_FAMA = .5*alpha*_MAMA + (1 - .5*alpha)*_FAMA[1]; 


MAMA= _MAMA;
FAMA=_FAMA;


End;
MAMA_FAMA=0;
indicator:
 
Code 
{Ehlers MAMA and FAMA indicator - coded by dn
//// From Cybernetic Analysis for Stocks and Futures}

Inputs: Price((H+L)/2), FastLimit(.5),SlowLimit(.05); 

Vars: MAMA(0), FAMA(0); 

value0 = MAMA_FAMA(price, fastlimit, slowlimit, MAMA, FAMA);
Plot1(MAMA, "MAMA"); 
Plot2(FAMA, "FAMA");
Regards,
-C

“Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.” - Sun Tzu
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  #4 (permalink)
 gpw797 
Mesa, AZ
 
Posts: 55 since Oct 2010
I got it to compile w/o the last line "MAMA_FAMA=0;"

I can compile as 2 different functions and call each up separately? Or is there a way to reference each indicator within the single function? Your help is much appreciated, thanks.

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  #5 (permalink)
 
cbritton's Avatar
 cbritton 
Atlanta, Georgia
Elite Member
 
Experience: Intermediate
Platform: NT
Broker: DDT
Trading: ZN, ZB
Posts: 230 since Mar 2010
Thanks Given: 152
Thanks Received: 256


gpw797 View Post
I got it to compile w/o the last line "MAMA_FAMA=0;"

I can compile as 2 different functions and call each up separately? Or is there a way to reference each indicator within the single function? Your help is much appreciated, thanks.

Really? It compiles for me without a problem. I'm using 8.8, update 6188.

Yes, you can split the function up. One to return FAMA and the other to return MAMA, but that's computationally more expensive, having to perform the same set of work twice. If that's not your concern, then go for it.

Regards,
-C

“Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.” - Sun Tzu
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  #6 (permalink)
 gpw797 
Mesa, AZ
 
Posts: 55 since Oct 2010
Opps.. I forgot to mention I am using Multicharts (sounds like you are using Tradestation by your version number). I will look at it some more tonight, thanks.

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  #7 (permalink)
 
cbritton's Avatar
 cbritton 
Atlanta, Georgia
Elite Member
 
Experience: Intermediate
Platform: NT
Broker: DDT
Trading: ZN, ZB
Posts: 230 since Mar 2010
Thanks Given: 152
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gpw797 View Post
Opps.. I forgot to mention I am using Multicharts (sounds like you are using Tradestation by your version number). I will look at it some more tonight, thanks.


And here I was thinking that there's no difference between the two easy language platforms
Good to know there are some differences.

Regards,
-C

“Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.” - Sun Tzu
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  #8 (permalink)
 
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 Big Mike 
Manta, Ecuador
Site Administrator
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gpw797 View Post
I got it to compile w/o the last line "MAMA_FAMA=0;"

I can compile as 2 different functions and call each up separately? Or is there a way to reference each indicator within the single function? Your help is much appreciated, thanks.

Make sure you named the function "MAMA_FAMA".

Mike

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  #9 (permalink)
 
cbritton's Avatar
 cbritton 
Atlanta, Georgia
Elite Member
 
Experience: Intermediate
Platform: NT
Broker: DDT
Trading: ZN, ZB
Posts: 230 since Mar 2010
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Thanks Received: 256


Big Mike View Post
Make sure you named the function "MAMA_FAMA".

Mike

Yes, an important point I left out

Regards,
-C

“Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.” - Sun Tzu
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  #10 (permalink)
 gpw797 
Mesa, AZ
 
Posts: 55 since Oct 2010

Changed name and got it to compile not excluding the last line. But not getting any signals generated from the following. What am I doing wrong? Thanks Sorry I am beginner at this stuff but trying to learn


 
Code 
//First attempt at MAMA FAMA

Inputs: 
	Price((H+L)/2), 
	FastLimit(.5),
	SlowLimit(.05),
	contractsize (1);

Variables:
	MAMA (0),
	FAMA (0);
	
If FAMA > MAMA then Buy contractsize Contracts Next Bar At Market;  

If FAMA < MAMA then Sell short contractsize Contracts Next Bar At Market;

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