//+------------------------------------------------------------------+
//| BandsLSMA.mq4 |
//| Copyright © 2005, MetaQuotes Software Corp. |
//| http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net/"
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 DodgerBlue
#property indicator_color2 Blue
#property indicator_color3 Blue
//---- indicator parameters
extern int BandsPeriod = 20;
extern int BandsShift = 0;
extern double BandsDeviations = 2.0;
//---- buffers
double MovingBuffer[];
double UpperBuffer[];
double LowerBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
SetIndexStyle(0, DRAW_LINE);
SetIndexBuffer(0, MovingBuffer);
SetIndexStyle(1, DRAW_LINE);
SetIndexBuffer(1, UpperBuffer);
SetIndexStyle(2, DRAW_LINE);
SetIndexBuffer(2, LowerBuffer);
//----
SetIndexDrawBegin(0, BandsPeriod+BandsShift);
SetIndexDrawBegin(1, BandsPeriod+BandsShift);
SetIndexDrawBegin(2, BandsPeriod+BandsShift);
//----
return(0);
}
//+------------------------------------------------------------------------+
//| LSMA - Least Squares Moving Average function calculation |
//| LSMA_In_Color Indicator plots the end of the linear regression line |
//+------------------------------------------------------------------------+
double LSMA(int Rperiod, int shift)
{
int i;
double sum;
int length;
double lengthvar;
double tmp;
double wt;
//----
length = Rperiod;
sum = 0;
for(i = length; i >= 1 ; i--)
{
lengthvar = length + 1;
lengthvar /= 3;
tmp = 0;
tmp = ( i - lengthvar)*Close[length-i+shift];
sum += tmp;
}
wt = sum*6 / (length*(length + 1));
//----
return(wt);
}
//+------------------------------------------------------------------+
//| Bollinger Bands |
//+------------------------------------------------------------------+
int start()
{
int i, k, counted_bars = IndicatorCounted();
double deviation;
double sum, oldval, newres;
//----
if(Bars <= BandsPeriod)
return(0);
//---- initial zero
if(counted_bars < 1)
for(i = 1; i <= BandsPeriod; i++)
{
MovingBuffer[Bars-i] = EMPTY_VALUE;
UpperBuffer[Bars-i] = EMPTY_VALUE;
LowerBuffer[Bars-i] = EMPTY_VALUE;
}
//----
int limit = Bars - counted_bars;
if(counted_bars > 0)
limit++;
for(i = 0; i < limit; i++)
MovingBuffer[i] = LSMA(BandsPeriod, i);
//----
i = Bars - BandsPeriod + 1;
if(counted_bars > BandsPeriod - 1)
i = Bars - counted_bars - 1;
while(i >= 0)
{
sum = 0.0;
k = i + BandsPeriod - 1;
oldval = MovingBuffer[i];
while(k >= i)
{
newres = Close[k] - oldval;
sum += newres*newres;
k--;
}
deviation = BandsDeviations*MathSqrt(sum / BandsPeriod);
UpperBuffer[i] = oldval + deviation;
LowerBuffer[i] = oldval - deviation;
i--;
}
//----
return(0);
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains close prices for each bar
Indicator Curves created:
Implements a curve of type DRAW_LINE
Indicators Used:
Custom Indicators Used:
Order Management characteristics:
Other Features: