Create fractal indicator
As would be the mathematical expression to construct the indicator fractal?.
I would like to create fractal indicator in matlab. To do that would have as it would be??
To calculate fractals should I consider maximum and minimum. If for example I have the first bullish candle, the second has a higher maximum than the second, the third has a maximum greater than the second, but the fourth candle has a lower minimum of the third then a fractal would appear not?
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- FOREX - Trends, Forecasts and Implications (Episode 16: June 2012)
- Not a bad Trend Reversal pattern. Maybe someone can make an indicator?
burnssss:
As would be the mathematical expression to construct the indicator fractal?.
I would like to create fractal indicator in matlab. To do that would have as it would be??
To calculate fractals should I consider maximum and minimum. If for example I have the first bullish candle, the second has a higher maximum than the second, the third has a maximum greater than the second, but the fourth candle has a lower minimum of the third then a fractal would appear not?
Simply said the first candle where a fractal can appear is bar 2
if(k>=2 && High[k] > High[k-2] && High[k] > High[k-1] && High[k] > High[k+1] && High[k] > High[k+2] ) fractal ...
or if(k>=2 && High[k] < High[k-2] && High[k] < High[k-1] && High[k] < High[k+1] && High[k] < High[k+2] ) fractal ...
I have no idea what Matlab is.
The usual code for fractals only calculate on a high with lower highs either side to qualify as a high fractal. Vice versa for a low.
Otherwise you would not get opposite fractals on the same bar.
For a high fractal. I would have thought that the code
if(iHighest(NULL,0,MODE_HIGH,3,index+1)==index+2)
would indicate a high fractal
How could modify the following code to create a csv file with historic data of fractal indicator?
#property copyright "Copyright © 2005, MetaQuotes Software Corp." #property link "http://www.metaquotes.net" #property indicator_chart_window #property indicator_buffers 2 #property indicator_color1 Red #property indicator_color2 Blue //---- input parameters //---- buffers double ExtUpFractalsBuffer[]; double ExtDownFractalsBuffer[]; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { //---- indicator buffers mapping SetIndexBuffer(0,ExtUpFractalsBuffer); SetIndexBuffer(1,ExtDownFractalsBuffer); //---- drawing settings SetIndexStyle(0,DRAW_ARROW); SetIndexArrow(0,119); SetIndexStyle(1,DRAW_ARROW); SetIndexArrow(1,119); //---- SetIndexEmptyValue(0,0.0); SetIndexEmptyValue(1,0.0); //---- name for DataWindow SetIndexLabel(0,"Fractal Up"); SetIndexLabel(1,"Fractal Down"); //---- initialization done return(0); } //+------------------------------------------------------------------+ //| Custor indicator deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- TODO: add your code here //---- return(0); } //+------------------------------------------------------------------+ //| Custom indicator iteration function | //+------------------------------------------------------------------+ int start() { int i,nCountedBars; bool bFound; double dCurrent; nCountedBars=IndicatorCounted(); //---- last counted bar will be recounted if(nCountedBars<=2) i=Bars-nCountedBars-3; if(nCountedBars>2) { nCountedBars--; i=Bars-nCountedBars-1; } //----Up and Down Fractals while(i>=2) { //----Fractals up bFound=false; dCurrent=High[i]; if(dCurrent>High[i+1] && dCurrent>High[i+2] && dCurrent>High[i-1] && dCurrent>High[i-2]) { bFound=true; ExtUpFractalsBuffer[i]=dCurrent; } //----6 bars Fractal if(!bFound && (Bars-i-1)>=3) { if(dCurrent==High[i+1] && dCurrent>High[i+2] && dCurrent>High[i+3] && dCurrent>High[i-1] && dCurrent>High[i-2]) { bFound=true; ExtUpFractalsBuffer[i]=dCurrent; } } //----7 bars Fractal if(!bFound && (Bars-i-1)>=4) { if(dCurrent>=High[i+1] && dCurrent==High[i+2] && dCurrent>High[i+3] && dCurrent>High[i+4] && dCurrent>High[i-1] && dCurrent>High[i-2]) { bFound=true; ExtUpFractalsBuffer[i]=dCurrent; } } //----8 bars Fractal if(!bFound && (Bars-i-1)>=5) { if(dCurrent>=High[i+1] && dCurrent==High[i+2] && dCurrent==High[i+3] && dCurrent>High[i+4] && dCurrent>High[i+5] && dCurrent>High[i-1] && dCurrent>High[i-2]) { bFound=true; ExtUpFractalsBuffer[i]=dCurrent; } } //----9 bars Fractal if(!bFound && (Bars-i-1)>=6) { if(dCurrent>=High[i+1] && dCurrent==High[i+2] && dCurrent>=High[i+3] && dCurrent==High[i+4] && dCurrent>High[i+5] && dCurrent>High[i+6] && dCurrent>High[i-1] && dCurrent>High[i-2]) { bFound=true; ExtUpFractalsBuffer[i]=dCurrent; } } //----Fractals down bFound=false; dCurrent=Low[i]; if(dCurrent<Low[i+1] && dCurrent<Low[i+2] && dCurrent<Low[i-1] && dCurrent<Low[i-2]) { bFound=true; ExtDownFractalsBuffer[i]=dCurrent; } //----6 bars Fractal if(!bFound && (Bars-i-1)>=3) { if(dCurrent==Low[i+1] && dCurrent<Low[i+2] && dCurrent<Low[i+3] && dCurrent<Low[i-1] && dCurrent<Low[i-2]) { bFound=true; ExtDownFractalsBuffer[i]=dCurrent; } } //----7 bars Fractal if(!bFound && (Bars-i-1)>=4) { if(dCurrent<=Low[i+1] && dCurrent==Low[i+2] && dCurrent<Low[i+3] && dCurrent<Low[i+4] && dCurrent<Low[i-1] && dCurrent<Low[i-2]) { bFound=true; ExtDownFractalsBuffer[i]=dCurrent; } } //----8 bars Fractal if(!bFound && (Bars-i-1)>=5) { if(dCurrent<=Low[i+1] && dCurrent==Low[i+2] && dCurrent==Low[i+3] && dCurrent<Low[i+4] && dCurrent<Low[i+5] && dCurrent<Low[i-1] && dCurrent<Low[i-2]) { bFound=true; ExtDownFractalsBuffer[i]=dCurrent; } } //----9 bars Fractal if(!bFound && (Bars-i-1)>=6) { if(dCurrent<=Low[i+1] && dCurrent==Low[i+2] && dCurrent<=Low[i+3] && dCurrent==Low[i+4] && dCurrent<Low[i+5] && dCurrent<Low[i+6] && dCurrent<Low[i-1] && dCurrent<Low[i-2]) { bFound=true; ExtDownFractalsBuffer[i]=dCurrent; } } i--; } //---- return(0); } //+------------------------------------------------------------------+
many thanks
burnssss:
I could give an example?
It means that by using this command, it generates a file with fractals after?
The historical data we obtained fractals in the same way?
no you can find where is a fractal and if you check this
https://www.mql5.com/en/code/7716
it might be you find a way to get the values in a csv file
I read the article, but I have several questions for the implantation of the code. That is iFRACTALS function is the function that fractals recounts not, but then I have to implement the code for storage in csv, it?
I mean, you would use the normal code fractals, but adding iFRACTAL function and code for storage in csv?. How to place it in different parts of the scrip?. Sorry for the inconvenience, I'm learning MQL4 and I need to save the historic fractals for statistical calculations.
thank you very much
saikatdg: Could this code be tweaked to form a three days high/low as fractal points instead of five days high/low??
Tweak it? Just write it.
bool peek(int i){ double a=High[i+1], b=High[i], c=High[i-1]; return (a-b)*(b-c) < 0 && b > c; }
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