EMA cross line indicator

Hello friends this is checkmail and have found one indicator, required from a long time but its having an bug or missing something in its code, the line breaks in between on the charts.

Can anyone here fix the bug or add some code :):

#property copyright ""

#property link ""

#property indicator_chart_window

#property indicator_buffers 3

#property indicator_color1 Green

#property indicator_color2 Red

#property indicator_color3 Yellow

extern int PeriodAv=12;

extern int PeriodAv1=24;

extern int Flat=1;

extern color ColorUp=Green;

extern color ColorDown=Red;

extern color ColorFlat=Yellow;

extern int Width=2;

double Line1[], Line2[], Line3[];

//+------------------------------------------------------------------+

//| Custom indicator initialization function |

//+------------------------------------------------------------------+

int init()

{

//---- indicators

SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,Width,ColorUp);//DRAW_LINE

SetIndexBuffer(0,Line1);

SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,Width,ColorDown);

SetIndexBuffer(1,Line2);

SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,Width,ColorFlat);//DRAW_LINE

SetIndexBuffer(2,Line3);

//----

return(0);

}

//+------------------------------------------------------------------+

//| Custom indicator deinitialization function |

//+------------------------------------------------------------------+

int deinit()

{

//----

//----

return(0);

}

//+------------------------------------------------------------------+

//| Custom indicator iteration function |

//+------------------------------------------------------------------+

int start()

{

//----

int i, Counted_bars=IndicatorCounted();

i=Bars-Counted_bars-1;

while(i>=0)

{

double MA_0=iMA(NULL,0,PeriodAv,0,MODE_EMA,PRICE_CLOSE,i),

MA_2=iMA(NULL,0,PeriodAv1,0,MODE_EMA,PRICE_CLOSE,i+1);

if(MA_0>MA_2) Line1=MA_0;

else

if(MA_0<MA_2) Line2=MA_0;

else if(MA_0==MA_2)

Line3=MA_0;

i--;

}

//----

return(0);

}

//+------------------------------------------------------------------+