//+------------------------------------------------------------------+
//| J_TPO_Clean.mq4 |
//| Copyright © 2005, |
//| |
//+------------------------------------------------------------------+
//
// J_TPO_Clean is a cleanup of the original J_TPO code, which
// was incomprehensible, and obviously translated poorly from some
// other implementation. Some bugs have been eliminated.
// It now does J_TPO on Close[] and High[] and Low[], in
// white, green and red respectively. If you want classic J_TPO,
// then just turn the colors of the green and red to 'none'.
//
// Matt (mbkennel@gmail.com)
//
// This code is released under the terms of the GNU General Public License V2
//
#property copyright "Copyright © 2005"
#property link "www.metatrader.org"
#property indicator_separate_window
#property indicator_minimum -1
#property indicator_maximum 1
#property indicator_buffers 3
#property indicator_color1 White
#property indicator_color2 Green
#property indicator_color3 Red
//---- input parameters
extern int Len=14;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- indicators
SetIndexStyle(0,DRAW_LINE);
SetIndexBuffer(0, ExtMapBuffer1);
SetIndexStyle(1,DRAW_LINE);
SetIndexBuffer(1, ExtMapBuffer2);
SetIndexStyle(2,DRAW_LINE);
SetIndexBuffer(2, ExtMapBuffer3);
//----
return(0);
}
//+------------------------------------------------------------------+
//| J_TPO indicatop |
//+------------------------------------------------------------------+
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=MathMin(Bars-counted_bars-Len,Bars-Len-1);
if (Len < 3) {
Print("J_TPO_B: length must be at least 3");
return(0); //
}
for (int i=limit; i>=0; i--) {
ExtMapBuffer1[i]=J_TPO_value(Close,Len,i);
ExtMapBuffer2[i]=J_TPO_value(High,Len,i);
ExtMapBuffer3[i]=J_TPO_value(Low,Len,i);
}
//---- done
return(0);
}
//+------------------------------------------------------------------+
double J_TPO_value(double input[], int Len, int shift) {
//
// compute the J_TPO function on input[shift], looking back up to Len data previous
//
double value, normalization, Lenp1half;
double accum, tmp, maxval;
int j, maxloc, m;
double arr1[], arr2[], arr3[];
bool flag;
accum=0;
ArrayResize(arr1,Len+1);
ArrayResize(arr2,Len+1);
ArrayResize(arr3,Len+1);
for (m=1; m<=Len; m++) {
arr2[m] = m;
arr3[m] = m;
arr1[m] = input[shift+Len-m];
}
// sort arr1[] in ascending order, arr2[] is the permutation index
// Note, this is a poor quadratic search, and will not scale well with Len
for (m=1; m<=(Len-1); m++) {
//
// find max value & its location in arr1 [m..m+Len]
//
maxval = arr1[m];
maxloc = m;
for (j=m+1; j<=Len; j++) {
if (arr1[j] < maxval) {
maxval = arr1[j];
maxloc = j;
}
}
//
// Swap arr1[m] with its max value
// amd similarly for arr2.
tmp = arr1[m];
arr1[m] = arr1[maxloc];
arr1[maxloc] = tmp;
tmp = arr2[m];
arr2[m] = arr2[maxloc];
arr2[maxloc] = tmp;
}
//
// arr3[1..Len] is nominally 1..m, but this here adjusts for
// ties.
m = 1;
while (m < Len) {
// Search for repeated values.
j = m + 1;
flag = true;
accum = arr3[m];
while (flag) {
if (arr1[m] != arr1[j]){
if ((j - m) > 1) {
// a streak of repeated values was found
// and so replace arr3[] for those with
// its average
accum = accum/(j - m);
for (int n=m; n<=(j-1); n++)
arr3[n] = accum;
}
flag = false;
} else {
accum += arr3[j];
j++;
} // if
} // while flag
m = j;
} // while (Len > m)
// This is the real guts of the J_TPO
// it is a simple statistic to see if the ranks, when applied in sorted order are
// "correlated" with 1..Len, a simple cross correlation of ranks.
// so if they are sorted then this gives 1, and if they are anti-sorted they give -1
// and similarly for intermediate values.
normalization = 12.0 / (Len*(Len-1)*(Len+1));
Lenp1half = (Len + 1) * 0.5;
for (accum=0,m=1; m<=Len; m++) {
// Print("m="+m+"Arr2[m] ="+arr2[m]+" arr3[m]="+arr3[m]);
accum += (arr3[m] - Lenp1half) * (arr2[m] - Lenp1half);
}
value = normalization * accum;
// Print("JTPO_B: accum = "+accum+" norm = "+normalization);
return(value);
}
Sample
Analysis
Market Information Used:
Indicator Curves created:
Implements a curve of type DRAW_LINE
Indicators Used:
Custom Indicators Used:
Order Management characteristics:
Other Features: