Where is iStdDevOnArray on mt5?

[toptunes]

I try to convert my indicator to mt5 version but I'm looking for iStdDevOnArray . 

its not on MQL5 Reference. anybody can help me?

[Chris70]

toptunes:

I try to convert my indicator to mt5 version but I'm looking for iStdDevOnArray . 

its not on MQL5 Reference. anybody can help me?

not sure if there's something like that somewhere in the standard library, but either way you might be looking for something like:

double ArrayStdDev(double &arr[])
  {
   int elements=ArraySize(arr);
   double mean=0; for (int i=0;i<elements;i++){mean+=arr[i];}
   mean/=elements;
   double mdev2sum=0; for (int i=0;i<elements;i++){mdev2sum+=pow(arr[i]-mean,2);}
   return sqrt(mdev2sum/elements);
  }

(I just quickly wrote this down; not tested)

[Ernst Van Der Merwe]

Instead of price, pass a handle as parameter.

int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,StdDevBuffer,INDICATOR_DATA);
   SetIndexBuffer(1,RSIBuffer,INDICATOR_CALCULATIONS);
//---
   if((handleRSI=iRSI(_Symbol,_Period,RSIPeriod,RSIPrice))==INVALID_HANDLE ||
      (handleStdDev=iStdDev(_Symbol,_Period,StdDevPeriod,0,MODE_SMA,handleRSI))==INVALID_HANDLE)
      return(INIT_FAILED);  
//---
   return(INIT_SUCCEEDED);
  }

[toptunes]

I can't believe that. I spent all my time to learn mt4 and heard today mt4 will be dying soon . and all our indicators will gone. and I GOT IT today there are many different is between mt4 and mt5. WHY? it's unbelievable this level of the difference. I know C#, PHP, javascript but I can't understand why mt5 is so hard to learn !! but I will try !! and thank you Ernst and Chris70

[Keith Watford]

Where did you hear that MT4 will be dying soon?

I don't believe that Metaquotes have made any announcement.

[Alain Verleyen]

Keith Watford:

Where did you hear that MT4 will be dying soon?

I don't believe that Metaquotes have made any announcement.

The Earth will burn too. Incredible !