How to create simple moving average (100 period) of OnBalanceVolumes data passed by array?

[MichTrader]

Hello guys, i hope that someone can please help me, cause i am (at this moment) at a dead end...

I want to create an array of the SMA (Period 100) of the On Balance Volumes (TICK_TYPE) data passed by iOBV function.

In other words, the new value of sma_Array at every candle formation must contain the sum of last 100 OBV values/100.  The problem is that i am not able to use iMA for data different from prices.

I know that perhaps i have to use OnCalculate() function, but i am not able, i have try with this code, which i had found here in another post, but on execution it doesn't work.

Please, if everyone can help me with this, i would be really grateful. This is the code i have tried, i only need to make works and understand this part.

I pass the handle with:    

                                     obvHandle=iOBV(_Symbol,_Period,VOLUME_TICK);

                                     ArraySetAsSeries(obvVal,true);     //obv array
                                     ArraySetAsSeries(smaVal,true);    //sma array
                                     candles=Bars(_Symbol,_Period);  // rates_total i pass to the function below...

Then i have a function NewCandle() to verify output at new candle formation, for example live on M1. Thanks :)

int SimpleMAOnBuffer(const int rates_total,const int prev_calculated,const int begin,
                     const int period,const double& price[],double& buffer[])
  {
   int i,limit;
//--- check for data
   if(period<=1 || rates_total-begin<period) return(0);
//--- save as_series flags
   bool as_series_price=ArrayGetAsSeries(price);
   bool as_series_buffer=ArrayGetAsSeries(buffer);
   if(as_series_price)  ArraySetAsSeries(price,false);
   if(as_series_buffer) ArraySetAsSeries(buffer,false);
//--- first calculation or number of bars was changed
   if(prev_calculated==0) // first calculation
     {
      limit=period+begin;
      //--- set empty value for first bars
      for(i=0;i<limit-1;i++) buffer[i]=0.0;
      //--- calculate first visible value
      double firstValue=0;
      for(i=begin;i<limit;i++)
         firstValue+=price[i];
      firstValue/=period;
      buffer[limit-1]=firstValue;
     }
   else limit=prev_calculated-1;
//--- main loop
   for(i=limit;i<rates_total && !IsStopped();i++)
      buffer[i]=buffer[i-1]+(price[i]-price[i-period])/period;
//--- restore as_series flags
   if(as_series_price)  ArraySetAsSeries(price,true);
   if(as_series_buffer) ArraySetAsSeries(buffer,true);

return(rates_total);
  }--

[William Roeder]

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