//+------------------------------------------------------------------+
//| newMACD_Alert.mq4 |
//| Copyright © 2005, David W. Thomas |
//| mailto:davidwt@usa.net |
//+------------------------------------------------------------------+
// This is the correct computation and display of MACD.
#property copyright "Copyright © 2005, David W. Thomas"
#property link "mailto:davidwt@usa.net"
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 Green
//---- input parameters
extern int FastMAPeriod = 12;
extern int SlowMAPeriod = 26;
extern int SignalMAPeriod = 9;
//---- buffers
double MACDLineBuffer[];
double SignalLineBuffer[];
double HistogramBuffer[];
//---- variables
double alpha = 0;
double alpha_1 = 0;
void SetArrow(datetime ArrowTime, double Price, double ArrowCode, color ArrowColor)
{
int err;
string ArrowName = DoubleToStr(ArrowTime,0);
if (ObjectFind(ArrowName) != -1) ObjectDelete(ArrowName);
if(!ObjectCreate(ArrowName, OBJ_ARROW, 0, ArrowTime, Price))
{
err=GetLastError();
Print("error: can't create Arrow! code #",err);
return;
}
else
{
ObjectSet(ArrowName, OBJPROP_ARROWCODE, ArrowCode);
ObjectSet(ArrowName, OBJPROP_COLOR , ArrowColor);
ObjectsRedraw();
/*if(ArrowCode==241)Alert("NMACD ",Period()," ",Symbol()," BUY");
if(ArrowCode==242)Alert("NMACD ",Period()," ",Symbol()," SELL");
PlaySound("alert2.wav");*/
}
}
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
IndicatorDigits(Digits + 1);
//---- indicators
SetIndexStyle(0, DRAW_LINE);
SetIndexBuffer(0, MACDLineBuffer);
SetIndexDrawBegin(0, SlowMAPeriod);
SetIndexStyle(1, DRAW_LINE, STYLE_DOT);
SetIndexBuffer(1, SignalLineBuffer);
SetIndexDrawBegin(1, SlowMAPeriod + SignalMAPeriod);
SetIndexStyle(2, DRAW_HISTOGRAM);
SetIndexBuffer(2, HistogramBuffer);
SetIndexDrawBegin(2, SlowMAPeriod + SignalMAPeriod);
//---- name for DataWindow and indicator subwindow label
IndicatorShortName("NMACD_Alert(" + FastMAPeriod+"," + SlowMAPeriod + "," + SignalMAPeriod + ")");
SetIndexLabel(0, "NMACD");
SetIndexLabel(1, "Signal");
SetIndexLabel(2, "Histogr");
//----
alpha = 2.0 / (SignalMAPeriod + 1.0);
alpha_1 = 1.0 - alpha;
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//----
ObjectsDeleteAll(0);
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 = limit; i >= 0; i--)
{
MACDLineBuffer[i] = iMA(NULL, 0, FastMAPeriod, 0, MODE_EMA, PRICE_CLOSE, i) -
iMA(NULL, 0, SlowMAPeriod, 0, MODE_EMA, PRICE_CLOSE, i);
SignalLineBuffer[i] = alpha*MACDLineBuffer[i] + alpha_1*SignalLineBuffer[i+1];
HistogramBuffer[i] = MACDLineBuffer[i] - SignalLineBuffer[i];
if((HistogramBuffer[i+1]>0)&&(HistogramBuffer[i+2]<=0))
{
SetArrow(Time[i+1],Low[i+1]-15*Point,241,Blue);
}
if((HistogramBuffer[i+1]<0)&&(HistogramBuffer[i+2]>=0))
{
SetArrow(Time[i+1],High[i+1]+15*Point,242,Gold);
}
}
//----
return(0);
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains the lowest prices of each bar
Series array that contains open time of each bar
Series array that contains the highest prices of each bar
Indicator Curves created:
Implements a curve of type DRAW_LINE
Implements a curve of type DRAW_HISTOGRAM
Indicators Used:
Moving average indicator
Custom Indicators Used:
Order Management characteristics:
Other Features:
It issuies visual alerts to the screen
It plays sound alerts