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Converting Multicharts variables to NinjaTrader


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Converting Multicharts variables to NinjaTrader

  #1 (permalink)
jjsshh
Helsinki, Finland
 
Posts: 23 since Dec 2013
Thanks Given: 14
Thanks Received: 4

Hi,
I have a hard time to convert ELA indicators that are using loops to NT. The problem is that NT cannot use arrays similar ways ELA language is able to do. Here is an example of what I am trying to convert to NT (for loop is the problem):

inputs:
depth = 10;

Array:
iprice = close;
pBuffer[30](0);
price = iprice;
summ=0;

for x=0 to depth-1
begin
pbuffer[x] = price;
price = (pbuffer[x] + pbuffer[x][1])/2.0;
summ+= price;
end;

I first came up with NT code like this:

for(int i=0 ; i<depth; i++)
{
pBuffer[i][0]=price;
price= (pBuffer[i] + pBuffer[i+1])/2.0;
summ+= price;
}

But then I realized that the part pbuffer[x][1] is using array from previous bar, and not the value pBuffer[i+1] from the current bars array. I tried to change pBuffer to dataserie but it was not able to read arrays from previous bars. If someone have some ideas about how to handle this kind of code, please let me know.

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  #3 (permalink)
 
cory's Avatar
 cory 
virginia
 
Experience: Intermediate
Platform: ninja
Trading: NQ
Posts: 6,098 since Jun 2009
Thanks Given: 877
Thanks Received: 8,090



jjsshh View Post
Hi,
I have a hard time to convert ELA indicators that are using loops to NT. The problem is that NT cannot use arrays similar ways ELA language is able to do. Here is an example of what I am trying to convert to NT (for loop is the problem):

inputs:
depth = 10;

Array:
iprice = close;
pBuffer[30](0);
price = iprice;
summ=0;

for x=0 to depth-1
begin
pbuffer[x] = price;
price = (pbuffer[x] + pbuffer[x][1])/2.0;
summ+= price;
end;

I first came up with NT code like this:

for(int i=0 ; i<depth; i++)
{
pBuffer[i][0]=price;
price= (pBuffer[i] + pBuffer[i+1])/2.0;
summ+= price;
}

But then I realized that the part pbuffer[x][1] is using array from previous bar, and not the value pBuffer[i+1] from the current bars array. I tried to change pBuffer to dataserie but it was not able to read arrays from previous bars. If someone have some ideas about how to handle this kind of code, please let me know.

in ninja you don't have to declare arrays for O,H,L,C you just simply call it Close[0] = currentprice, Close[1] = previous price etc... make sure you don't call out of bound i.e. you have only 5 bars and try to call Close[5]

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  #4 (permalink)
jjsshh
Helsinki, Finland
 
Posts: 23 since Dec 2013
Thanks Given: 14
Thanks Received: 4

Thanks cory for your advice,

but I am not sure if that help in this case. If I understand the code correct the problem is that the array pBuffer is not storing Close but instead it is storing this: price = (pbuffer[x] + pbuffer[x][1])/2.0; I have read a more about this thing and it seems that it is impossible to call an array from previous bar.

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  #5 (permalink)
 
cory's Avatar
 cory 
virginia
 
Experience: Intermediate
Platform: ninja
Trading: NQ
Posts: 6,098 since Jun 2009
Thanks Given: 877
Thanks Received: 8,090


jjsshh View Post
Thanks cory for your advice,

but I am not sure if that help in this case. If I understand the code correct the problem is that the array pBuffer is not storing Close but instead it is storing this: price = (pbuffer[x] + pbuffer[x][1])/2.0; I have read a more about this thing and it seems that it is impossible to call an array from previous bar.

you don't need array pBuffer, the O,H,L,C of prices are auto maintained by Ninja and ready for you to use.

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