SD Channels
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Overview
The Standard Dev Channels tool is a visual technical analysis indicator designed to help traders understand price volatility and potential trading boundaries. Instead of just showing a single average price, this script creates dynamic "channels" or corridors around the market price, helping to identify where the market is moving and how far it is deviating from its norm.
Core Components
The logic of this tool relies on three primary building blocks:
- Moving Averages (The Centerline): The indicator calculates average prices over specific periods. These serve as the "baseline" or the equilibrium point for the market. By looking at these averages, traders can see the general trend of the price—whether it is currently heading up, down, or moving sideways.
- Standard Deviation (The Volatility Measure): To determine how wide the channels should be, the script calculates "Standard Deviation." In simple terms, this measures how much the price is swinging away from its average. High volatility results in wider deviations, while low volatility results in tighter ones.
- Multipliers (The Channel Width): The script uses specific factors to multiply the standard deviation. This allows for the creation of multiple "layers" of channels, providing different levels of perspective on price extremes.
How the Logic Works
When the script runs on a chart, it performs the following steps simultaneously for every candle:
- Baseline Calculation: It identifies the current trend by calculating two separate moving averages based on your chosen settings.
- Volatility Detection: It measures the current market "noise" or volatility using the Standard Deviation calculation over a set number of bars.
- Channel Construction:
- It creates the First Channel by adding and subtracting the first multiplier from the first moving average. This represents a primary zone of activity.
- It creates the Second Channel by applying a different multiplier to the second moving average. Because this second multiplier is typically larger, it creates a wider "outer" boundary.
Visual Interpretation
On your chart, this results in two distinct sets of boundaries (upper and lower bands) surrounding the price action:
- Inner Channels: These are tighter zones that represent standard market movement. They help identify immediate support and resistance levels.
- Outer Channels: These are wider zones that represent more significant price deviations. When the price moves toward these outer lines, it often indicates that the market is reaching an "overextended" state, which may signal a potential reversal or a period of consolidation.
By observing where the price sits in relation to these bands, users can better gauge whether the current market movement is "normal" or if the price has stretched significantly far away from its average.
Indicators Used
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SD Channels
//+------------------------------------------------------------------+
//| Standard Dev Channels.mq4 |
//| Copyright © 2006, Luis Guilherme Damiani |
//| http://www.damianifx.com.br |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Luis Guilherme Damiani"
#property link "http://www.damianifx.com.br"
#property indicator_chart_window
#property indicator_buffers 5
#property indicator_color1 Black //Moving Average
#property indicator_color2 Violet // Lower band 1
#property indicator_color3 Violet // Upper band 1
#property indicator_color4 MediumSlateBlue // Lower band 2
#property indicator_color5 MediumSlateBlue // Upper band 2
//#property indicator_color6 BlueViolet // Lower band 3
//#property indicator_color7 BlueViolet // Upper band 3
//---- indicator buffers
double MA_Buffer0[];
double Ch1up_Buffer1[];
double Ch1dn_Buffer2[];
double Ch2up_Buffer3[];
double Ch2dn_Buffer4[];
double MA2_Buffer5[];
//double Ch3dn_Buffer6[];
//---- input parameters
extern int PeriodsSD=15;
extern int MA_Periods=10;
extern int MA_Periods2=10;
int MA_type=MODE_LWMA;
extern double Mult_Factor1= 1.0;
extern double Mult_Factor2= 2.0;
//extern double Mult_Factor3= 4.8;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
string mat;
//---7- indicators
// MA
SetIndexStyle(0,DRAW_NONE);
SetIndexBuffer(0,MA_Buffer0);
SetIndexDrawBegin(0,0);
SetIndexStyle(5,DRAW_NONE);
SetIndexBuffer(5,MA2_Buffer5);
SetIndexDrawBegin(5,0);
/*if (MA_type==MODE_LWMA)SetIndexLabel(0,"WMA"+MA_Periods) else
{
if (MA_type==MODE_SMA) SetIndexLabel(0,"SMA"+MA_Periods) else
{
if (MA_type==MODE_EMA) SetIndexLabel(0,"EMA"+MA_Periods) else
SetIndexLabel(0,"SMMA"+MA_Periods);
};
};*/
// ATR 1 up
SetIndexStyle(1,DRAW_LINE,DRAW_LINE,3);
SetIndexBuffer(1,Ch1up_Buffer1);
SetIndexDrawBegin(1,0);
SetIndexLabel(1,"SDRu "+PeriodsSD+", "+Mult_Factor1);
// ATR 1 down
SetIndexStyle(2,DRAW_LINE,DRAW_LINE,3);
SetIndexBuffer(2,Ch1dn_Buffer2);
SetIndexDrawBegin(2,0);
SetIndexLabel(2,"SDd "+PeriodsSD+", "+Mult_Factor1);
// ATR 2 up
SetIndexStyle(3,DRAW_LINE,DRAW_LINE,2);
SetIndexBuffer(3,Ch2up_Buffer3);
SetIndexDrawBegin(3,0);
SetIndexLabel(3,"SDu "+PeriodsSD+", "+Mult_Factor2);
// ATR 2 down
SetIndexStyle(4,DRAW_LINE,DRAW_LINE,2);
SetIndexBuffer(4,Ch2dn_Buffer4);
SetIndexDrawBegin(4,0);
SetIndexLabel(4,"SDd "+PeriodsSD+", "+Mult_Factor2);
/* // ATR 3 up
SetIndexStyle(5,DRAW_LINE);
SetIndexBuffer(5,Ch3up_Buffer5);
SetIndexDrawBegin(5,0);
SetIndexLabel(5,"SDu "+PeriodsSD+", "+Mult_Factor3);
// ATR 3 down
SetIndexStyle(6,DRAW_LINE);
SetIndexBuffer(6,Ch3dn_Buffer6);
SetIndexDrawBegin(6,0);
SetIndexLabel(6,"ATRd "+PeriodsSD+", "+Mult_Factor3);*/
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{//----
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int fixed_bars=IndicatorCounted();
for(int i=0;i< Bars - fixed_bars;i++)
{
double atr=iStdDev(NULL,0,PeriodsSD,MODE_LWMA,0,PRICE_TYPICAL,i);
double ma=iMA(NULL,0,MA_Periods,0,MA_type,PRICE_TYPICAL,i);
double ma2=iMA(NULL,0,MA_Periods2,0,MA_type,PRICE_TYPICAL,i);
MA_Buffer0[i]=ma;
MA2_Buffer5[i]=ma2;
Ch1up_Buffer1[i]=ma+atr*Mult_Factor1;
Ch1dn_Buffer2[i]=ma-atr*Mult_Factor1;
Ch2up_Buffer3[i]=ma2+atr*Mult_Factor2;
Ch2dn_Buffer4[i]=ma2-atr*Mult_Factor2;
// Ch3up_Buffer5[i]=ma+atr*Mult_Factor3;
// Ch3dn_Buffer6[i]=ma-atr*Mult_Factor3;
}
//----
//----
return(0);
}
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