Where is my error ?

//+------------------------------------------------------------------+
//|                                               MTF_Stochastic.mq4 |
//|                                      Copyright © 2006, Keris2112 |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "C"
#property link      "h"

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 LimeGreen
#property indicator_color2 Red



//---- input parameters
/*************************************************************************
PERIOD_M1   1
PERIOD_M5   5
PERIOD_M15  15
PERIOD_M30  30 
PERIOD_H1   60
PERIOD_H4   240
PERIOD_D1   1440
PERIOD_W1   10080
PERIOD_MN1  43200
You must use the numeric value of the timeframe that you want to use
when you set the TimeFrame' value with the indicator inputs.
---------------------------------------
MODE_SMA    0 Simple moving average, 
MODE_EMA    1 Exponential moving average, 
MODE_SMMA   2 Smoothed moving average, 
MODE_LWMA   3 Linear weighted moving average. 
You must use the numeric value of the MA Method that you want to use
when you set the 'ma_method' value with the indicator inputs.

**************************************************************************/
extern int       TimeFrame=0;
extern int       period=27; 
extern int       method=3;                         
extern int       price=0;
//---- indicator buffers
double        Buffer1[],
                Buffer2[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
//---- indicator lines
    SetIndexBuffer(0,Buffer1);
    SetIndexBuffer(1,Buffer2);
     SetIndexStyle(0,DRAW_HISTOGRAM);
    SetIndexStyle(1,DRAW_HISTOGRAM);

//---- name for DataWindow and indicator subwindow label
    string TimeFrameStr;
    switch(TimeFrame)
    {
        case 1:        TimeFrameStr="Period M1"; break;
        case 5:        TimeFrameStr="Period M5"; break;
        case 15:        TimeFrameStr="Period M15"; break;
        case 30:        TimeFrameStr="Period M30"; break;
        case 60:        TimeFrameStr="Period H1"; break;
        case 240:    TimeFrameStr="Period H4"; break;
        case 1440:    TimeFrameStr="Period D1"; break;
        case 10080:    TimeFrameStr="Period W1"; break;
        case 43200:    TimeFrameStr="Period MN1"; break;
        default:        TimeFrameStr="Current Timeframe";
    }

    IndicatorShortName(TimeFrameStr+" HMA Russian Histo("+period+","+method+","+price+")");  
}


//+------------------------------------------------------------------+
//| MTF Stochastic                                                   |
//+------------------------------------------------------------------+
int start()
{
    for(int i = Bars-1-IndicatorCounted(); i >= 0; i--)
    {
        int shift1 = iBarShift(NULL,TimeFrame,Time[i]),
             time1  = iTime    (NULL,TimeFrame,shift1),
             shift2 = iBarShift(NULL,0,time1);

        Buffer1[shift2] = iCustom(NULL,TimeFrame,"HMA Russian Histo",period,method,price,0,shift1);
        Buffer2[shift2] = iCustom(NULL,TimeFrame,"HMA Russian Histo",period,method,price,1,shift1);

    //----
    //    linear interpolation for indicators from a higher timeframe
        if(TimeFrame <= Period())
            continue;

    //----
    //    current candle
        if(shift1==0)
            for(int n = 1; shift2-n >= 0; n++)
            {
                Buffer1[shift2-n] = Buffer1[shift2];
                Buffer2[shift2-n] = Buffer2[shift2];
            }

    //    count number of intermediate bars
        for(n = 1; shift2+n < Bars && Time[shift2+n] > iTime(NULL,TimeFrame,iBarShift(NULL,TimeFrame,Time[shift2+n],true)); n++)
            continue;

    //----
    //    apply interpolation
        double factor = 1.0 / n;
        for(int k = 1; k < n; k++)
        {
            Buffer1[shift2+k] = k*factor*Buffer1[shift2+n] + (1.0-k*factor)*Buffer1[shift2];
            Buffer2[shift2+k] = k*factor*Buffer2[shift2+n] + (1.0-k*factor)*Buffer2[shift2];
        }
    }


    return(0);
}