Can you help me please

[aladar1]

Hello
I took an indicator for mt4 and i will like to put an alert sound on it; i try many time to fix it , but no result.
If any body can help me ? (sorry for my english is bad) i trade well with this one but i don't want to stays all the days for waiting the signal.
I just want the signal sound when the color change (red to green)
Thank a lot to help me!

I put de code below:

//+------------------------------------------------------------------+
//|
//|
//|
//+------------------------------------------------------------------+

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 Green
#property indicator_color2 Red
//---- input parameters
extern int BoxSize=15;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
int Cur=0;
int KirUp=0;
int KirDn=0;
int kr=0;
int no=0;
double valueh=0;
double valuel=0;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
SetIndexStyle(0,DRAW_HISTOGRAM);
SetIndexBuffer(0,ExtMapBuffer1);
SetIndexLabel(0,"XOUP");
SetIndexStyle(1,DRAW_HISTOGRAM);
SetIndexBuffer(1,ExtMapBuffer2);
SetIndexLabel(1,"XODOWN");
IndicatorShortName("I-XO-A-H");
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//---- TODO: add your code here

//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int CurrentBar;
double Hi,Lo,Curb;
int counted_bars=IndicatorCounted();
//---- TODO: add your code here
//----Calculation---------------------------
for(int i=0;i<=Bars;i++)
{
CurrentBar = Bars-i;
if (Cur<1)
{
Hi=Close[CurrentBar];
Lo=Close[CurrentBar];
Cur=1;
}
Curb=Close[CurrentBar];
if (Curb>(Hi+BoxSize*Point))
{
Cur+=1;
Hi=Curb;
Lo=Curb-BoxSize*Point;
KirUp=1;
KirDn=0;
kr+=1;
no=0;
}
if (Curb<(Lo-BoxSize*Point))
{
Cur+=1;
Lo=Curb;
Hi=Curb+BoxSize*Point;
KirUp=0;
KirDn=1;
no+=1;
kr=0;
}
valueh=kr;
valuel=0-no;
ExtMapBuffer1[CurrentBar]=valueh;
ExtMapBuffer2[CurrentBar]=valuel;
}
//----
return(0);
}
//+------------------------------------------------------------------+

Thank againt