sample

//+------------------------------------------------------------------+
//|                                                       sample.mq5 |
//+------------------------------------------------------------------+
#property link      "https://www.mql5.com"
#property version   "1.00"

#include <RSIOnArray.mqh>
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   double array[]={100,101,102};
   int total=0;
   int period=2;
   int shift=0;
   double rsi=iRSIOnArray(array,total,period,shift);
   Print("rsi: ",rsi);
   return INIT_SUCCEEDED;
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
  }
//+------------------------------------------------------------------+