EMA_Angle1
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This indicator is designed to help traders visualize the momentum and "slope" of an Exponential Moving Average (EMA). Rather than just showing the price movement, it measures the steepness of the EMA's trajectory to identify when a trend is gaining strength, weakening, or moving sideways.
How the Logic Works
The tool focuses on the angle at which the EMA moves over a specific period. By calculating the difference between two points on the EMA (the "start" and "end" points), the script determines how sharply the line is tilted.
Key components of the logic include:
- Slope Calculation: The script looks back at the EMA at two different distances from the current price. By comparing these two values, it calculates the rate of change.
- Dynamic Scaling: To ensure the data is readable regardless of which currency pair you are trading, the logic includes a "Scaling Factor." This automatically adjusts based on the symbol (for example, applying a different multiplier for JPY pairs) so that the visual results remain consistent across different markets.
- Threshold Filtering: You can set a specific "Angle Threshold." The logic uses this to categorize the market movement into three distinct visual states:
- Bullish Momentum (Green): When the upward angle is greater than your chosen threshold, it indicates a strong positive trend.
- Bearish Momentum (Red): When the downward angle falls below your negative threshold, it indicates a strong negative trend.
- Neutral/Consolidation (Yellow): When the angle stays within your threshold (near zero), it signifies that the market is moving sideways or "flat," suggesting a lack of clear direction.
Visual Representation
The results are displayed as a histogram in a separate window at the bottom of your chart. This allows you to see at a glance whether the trend is accelerating, slowing down, or entering a period of indecision without cluttering your main price candles.
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EMA_Angle1
/*-----------------------------+
| |
| Shared by www.Aptrafx.com |
| |
+------------------------------*/
//+------------------------------------------------------------------+
//| EMA_Angle.mq4 |
//| jpkfox |
//| |
//| You can use this indicator to measure when the EMA angle is |
//| "near zero". AngleTreshold determines when the angle for the |
//| EMA is "about zero": This is when the value is between |
//| [-AngleTreshold, AngleTreshold] (or when the histogram is red). |
//| EMAPeriod: EMA period |
//| AngleTreshold: The angle value is "about zero" when it is |
//| between the values [-AngleTreshold, AngleTreshold]. |
//| StartEMAShift: The starting point to calculate the |
//| angle. This is a shift value to the left from the |
//| observation point. Should be StartEMAShift > EndEMAShift. |
//| StartEMAShift: The ending point to calculate the |
//| angle. This is a shift value to the left from the |
//| observation point. Should be StartEMAShift > EndEMAShift. |
//| |
//| Modified by MrPip |
//| Red for down |
//| Yellow for near zero |
//| Green for up |
//| 10/15/05 MrPip |
//| Corrected problem with USDJPY and optimized code |
//| 10/23/05 Added other JPY crosses |
//| |
//+------------------------------------------------------------------+
#property copyright "jpkfox"
#property link "http://www.strategybuilderfx.com/forums/showthread.php?t=15274&page=1&pp=8"
//---- indicator settings
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 LimeGreen
#property indicator_color2 Yellow
#property indicator_color3 FireBrick
//---- indicator parameters
extern int EMAPeriod=34;
extern double AngleTreshold=15;
extern int StartEMAShift=4;
extern int EndEMAShift=0;
//---- indicator buffers
double UpBuffer[];
double DownBuffer[];
double ZeroBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- 2 additional buffers are used for counting.
IndicatorBuffers(3);
//---- drawing settings
SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,2);
SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,2);
SetIndexStyle(2,DRAW_HISTOGRAM,STYLE_SOLID,2);
IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+2);
//---- 3 indicator buffers mapping
if(!SetIndexBuffer(0,UpBuffer) &&
!SetIndexBuffer(1,DownBuffer) &&
!SetIndexBuffer(2,ZeroBuffer))
Print("cannot set indicator buffers!");
//---- name for DataWindow and indicator subwindow label
IndicatorShortName("EMA_Angle("+EMAPeriod+","+AngleTreshold+","+StartEMAShift+","+EndEMAShift+")");
//---- initialization done
return(0);
}
//+------------------------------------------------------------------+
//| The angle for EMA |
//+------------------------------------------------------------------+
int start()
{
double fEndMA, fStartMA;
double fAngle, mFactor, dFactor;
int nLimit, i;
int nCountedBars;
double angle;
int ShiftDif;
string Sym;
if(EndEMAShift >= StartEMAShift)
{
Print("Error: EndEMAShift >= StartEMAShift");
StartEMAShift = 6;
EndEMAShift = 0;
}
nCountedBars = IndicatorCounted();
//---- check for possible errors
if(nCountedBars<0)
return(-1);
//---- last counted bar will be recounted
if(nCountedBars>0)
nCountedBars--;
nLimit = Bars-nCountedBars;
dFactor = 2*3.14159/180.0;
mFactor = 100000.0;
Sym = StringSubstr(Symbol(),3,3);
if (Sym == "JPY") mFactor = 1000.0;
ShiftDif = StartEMAShift-EndEMAShift;
mFactor /= ShiftDif;
//---- main loop
for(i=0; i<nLimit; i++)
{
fEndMA=iMA(NULL,0,EMAPeriod,0,MODE_EMA,PRICE_LOW,i+EndEMAShift);
fStartMA=iMA(NULL,0,EMAPeriod,0,MODE_EMA,PRICE_LOW,i+StartEMAShift);
// 10000.0 : Multiply by 10000 so that the fAngle is not too small
// for the indicator Window.
fAngle = mFactor * (fEndMA - fStartMA)/2.0;
// fAngle = MathArctan(fAngle)/dFactor;
DownBuffer[i] = 0.0;
UpBuffer[i] = 0.0;
ZeroBuffer[i] = 0.0;
if(fAngle > AngleTreshold)
{
UpBuffer[i] = fAngle;
}
else if (fAngle < -AngleTreshold)
{
DownBuffer[i] = fAngle;
}
else ZeroBuffer[i] = fAngle;
}
return(0);
}
//+------------------------------------------------------------------+
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