Linear regression slope from MT5 to MT4

[Anuwat Tanasittipan]

Hello,

I have an indicator on MT5 which includes linear regression slope, with the slope function (to get the slope of array x[]) as follows:

double LinRegrSlope(int per)
  {
   double sum=0.0;
   double wsum=0.0;
   for(int i=per;i>0;i--)
     {
      sum+=x[i];
      wsum+=x[i]*(per+1-i);
     }
   double lrs1;
   lrs1=6.*(2.*wsum/(per+1)/sum-1.)/(per-1); // normalize to SMA
   lrs1 = lrs1*100000.;
   if(lrs1>0) lrs1 = MathLog(lrs1);
      else {if(lrs1<0)lrs1 = -1.*MathLog(MathAbs(lrs1));
            else lrs1 = 0;
            }
   return(lrs1); 
  }

 This function works normally on my MT5 indicator. However, running it on MT4, the indicator gets "zero divide" on the line: lrs1=6.*(2.*wsum/(per+1)/sum-1.)/(per-1); at the "/sum-1."

Is the function missing something for MT4?

Thank you. 

[Stuart Browne]

anuwat:

Hello,

I have an indicator on MT5 which includes linear regression slope, with the slope function (to get the slope of array x[]) as follows:

 This function works normally on my MT5 indicator. However, running it on MT4, the indicator gets "zero divide" on the line: lrs1=6.*(2.*wsum/(per+1)/sum-1.)/(per-1); at the "/sum-1."

Is the function missing something for MT4?

Thank you. 

Hi

A quick and dirty solution is to check if (sum-1)  = 0 and make it something like 0.0000000001 instead