Custom indicator not based on any of the existing indicators?

[nelsoneci]

Hello there.

I've been trying to create an indicator (for learning purposes) that tracks the maximum and the minimum value of the last N samples in the current period.

I want to use the indicator from a class inheriting from CExpertSignal.

I noticed that most articles talk about creating custom indicators, but they are not really "custom", they are based on a existing one.

So, if I want to get the maximum and the minimum from the last N samples, I have been considering:

1) Using CopyHigh, CopyLow from the CExpertSignal and then compute the maximum and the minimum, with no indicator.

2) Find a way to create a "real" custom indicator and compute the max and the min there, and then use the indicator in the CExpertSignal. 

What should I try? 

[nelsoneci]

nelsoneci:

Hello there.

I've been trying to create an indicator (for learning purposes) that tracks the maximum and the minimum value of the last N samples in the current period.

I want to use the indicator from a class inheriting from CExpertSignal.

I noticed that most articles talk about creating custom indicators, but they are not really "custom", they are based on a existing one.

So, if I want to get the maximum and the minimum from the last N samples, I have been considering:

1) Using CopyHigh, CopyLow from the CExpertSignal and then compute the maximum and the minimum, with no indicator.

2) Find a way to create a "real" custom indicator and compute the max and the min there, and then use the indicator in the CExpertSignal. 

What should I try? 

I found this code : https://github.com/dennislwm/MLEA/blob/master/MQL5/Include/EA/TurtleSignal.mqh

This is the data I need. Is this the right way to do it? My guess is that it is better to find a way that avoids the multiple copies.

double CTurtleSignal::Highest(int spannedPeriod)
 { 
    double ret = 0;
    
    int copied = CopyHigh(m_symbol.Name(), m_period, 1, spannedPeriod, High);
    for (int i=0; i<spannedPeriod; i++) 
        ret = MathMax(ret, High[i]);

    return ret;
 } 

[Rodrigo Malacarne]

nelsoneci:

I found this code : https://github.com/dennislwm/MLEA/blob/master/MQL5/Include/EA/TurtleSignal.mqh

This is the data I need. Is this the right way to do it? My guess is that it is better to find a way that avoids the multiple copies.

 

 } 

You can also use the functions ArrayMaximum and ArrayMinimum to find highest / lowest values inside an array.