самопальный индикатор индекса...

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 Green

double usdx[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
      SetIndexStyle(0,DRAW_LINE);
      SetIndexBuffer(0, usdx);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
  int i;
//----
  double eurusd, gbpusd, usdchf, audusd, usdcad, usdjpy, nzdusd;
//----
    int limit;
    int counted_bars = IndicatorCounted();
//---- последний посчитанный бар будет пересчитан
    if(counted_bars > 0) 
        counted_bars--;
    limit = Bars - counted_bars - 1;
//---- основной цикл
    for( i = limit; i >= 0; i--)
      {
         eurusd = iClose("EURUSD", 0, i);
         gbpusd = iClose("GBPUSD", 0, i);
         audusd = iClose("AUDUSD", 0, i);
         nzdusd = iClose("NZDUSD", 0, i);
         usdchf = iClose("USDCHF", 0, i);
         usdcad = iClose("USDCAD", 0, i);
         usdjpy = iClose("USDJPY", 0, i);
         
         usdx[i] = MathPow((usdchf*usdcad*usdjpy)/(eurusd*gbpusd*audusd*nzdusd),1/7);
      }

   return(0);
  }
//+------------------------------------------------------------------+