//+------------------------------------------------------------------+
//| EMA-alert.mq4 |
//| Copyright © 2007, MetaQuotes Software Corp. |
//| http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"
#property indicator_chart_window
#property indicator_buffers 1
//---- input parameters
extern int ema_period = 34;
//---- buffers
double ExtMapBuffer1[];
extern bool Box_Alert=true;
extern bool Sound_Alert=true;
extern bool Email_Alert=false;
extern int pip_distance = 10;
datetime lastimealert;
//----
double ema_value;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
SetIndexBuffer(0, ExtMapBuffer1);
//---- name for DataWindow and indicator subwindow label
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int limit;
int counted_bars = IndicatorCounted();
//---- check for possible errors
if(counted_bars < 0)
return(-1);
//---- last counted bar will be recounted
if(counted_bars > 0)
counted_bars--;
limit = Bars - counted_bars;
//----
for(int i = 0; i < limit; i++)
{
ema_value= iMA(NULL,0,ema_period,0,MODE_EMA,PRICE_CLOSE,i);
//----
ExtMapBuffer1[i] = ema_value-Ask ;
if(MathAbs(ema_value-Bid)<=pip_distance*Point&& lastimealert!= Time[0] )
{
if(Box_Alert) Alert("Price is within ",pip_distance," pips of ",ema_period," period EMA");
if(Sound_Alert) PlaySound("alert.wav");
if(Email_Alert) SendMail("Price Alert on "+Symbol(),"Price is within "+pip_distance+" pips of "+ema_period+" period EMA");
lastimealert= Time[0];
}
}
//----
return(0);
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains open time of each bar
Indicator Curves created:
Indicators Used:
Moving average indicator
Custom Indicators Used:
Order Management characteristics:
Other Features:
It issuies visual alerts to the screen
It plays sound alerts
It sends emails