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المشاركة الأصلية كتبت بواسطة ابو غيـداء

code to automatically identify pivots

********************************** */

// -- what will be our lookback range for the hh and ll?
Farback=param("how far back to go",100,50,5000,10);
nbars = param("number of bars", 12, 5, 40);

// -- title.

Title = name() + " (" + strleft(fullname(), 15) + ") o: " + open + ",

h: " + high + ", l: " + low + ", c: " + close;

// -- plot basic candle chart

plotohlc(open, high, low, close,

"bidx = " + barindex() +

"\n" + "o = " + o + "\n"+"h = "+ h + "\n"+"l = " + l

+ "\n"+"c ",

colorblack, stylecandle);

graphxspace=7;

// -- create 0-initialized arrays the size of barcount

ahpivs = h - h;

alpivs = l - l;

// -- more for ****** use, not necessary for basic plotting

ahpivhighs = h - h;

alpivlows = l - l;

ahpividxs = h - h;

alpividxs = l - l;

nhpivs = 0;

nlpivs = 0;

lasthpidx = 0;

lastlpidx = 0;

lasthph = 0;

lastlpl = 0;

curpivbaridx = 0;

// -- looking back from the current bar, how many bars

// back were the hhv and llv values of the previous

// n bars, etc.?

Ahhvbars = hhvbars(h, nbars);

allvbars = llvbars(l, nbars);

ahhv = hhv(h, nbars);

allv = llv(l, nbars);

// -- would like to set this up so pivots are calculated back from

// last visible bar to make it easy to "go back" and see the pivots

// this code would find. However, the first instance of

// _trace output will show a value of 0

avisbars = status("barvisible");

nlastvisbar = lastvalue(highest(iif(avisbars, barindex(), 0)));

_trace("last visible bar: " + nlastvisbar);

// -- initialize value of curtrend

curbar = (barcount-1);

curtrend = "";

if (allvbars[curbar] <

ahhvbars[curbar]) {

curtrend = "d";

}

else {

curtrend = "u";

}

// -- loop through bars. Search for

// entirely array-based approach

// in ****** version

for (i=0; i<farback; i++) {

curbar = (barcount - 1) - i;

// -- have we identified a pivot? If trend is down...

If (allvbars[curbar] < ahhvbars[curbar]) {

// ... And had been up, this is a trend change

if (curtrend == "u") {

curtrend = "d";

// -- capture pivot information

curpivbaridx = curbar - allvbars[curbar];

alpivs[curpivbaridx] = 1;

alpivlows[nlpivs] = l[curpivbaridx];

alpividxs[nlpivs] = curpivbaridx;

nlpivs++;

}

// -- or current trend is up

} else {

if (curtrend == "d") {

curtrend = "u";

curpivbaridx = curbar - ahhvbars[curbar];

ahpivs[curpivbaridx] = 1;

ahpivhighs[nhpivs] = h[curpivbaridx];

ahpividxs[nhpivs] = curpivbaridx;

nhpivs++;

}

// -- if curtrend is up...else...

}

// -- loop through bars

}

// -- basic attempt to add a pivot this logic may have missed

// -- ok, now i want to look at last two pivots. If the most

// recent low pivot is after the last high, i could

// still have a high pivot that i didn't catch

// -- start at last bar

curbar = (barcount-1);

candidx = 0;

candprc = 0;

lastlpidx = alpividxs[0];

lastlpl = alpivlows[0];

lasthpidx = ahpividxs[0];

lasthph = ahpivhighs[0];

if (lastlpidx > lasthpidx) {

// -- bar and price info for candidate pivot

candidx = curbar - ahhvbars[curbar];

candprc = ahhv[curbar];

if (

lasthph < candprc and

candidx > lastlpidx and

candidx < curbar) {


// -- ok, we'll add this as a pivot...

Ahpivs[candidx] = 1;

// ...and then rearrange s in the

// pivot information arrays

for (j=0; j<nhpivs; j++) {

ahpivhighs[nhpivs-j] = ahpivhighs[nhpivs-

(j+1)];

ahpividxs[nhpivs-j] = ahpividxs[nhpivs-(j+1)];

}

ahpivhighs[0] = candprc ;

ahpividxs[0] = candidx;

nhpivs++;

}

} else {


// -- bar and price info for candidate pivot

candidx = curbar - allvbars[curbar];

candprc = allv[curbar];

if (

lastlpl > candprc and

candidx > lasthpidx and

candidx < curbar) {


// -- ok, we'll add this as a pivot...

Alpivs[candidx] = 1;

// ...and then rearrange s in the

// pivot information arrays

for (j=0; j<nlpivs; j++) {

alpivlows[nlpivs-j] = alpivlows[nlpivs-(j+1)];

alpividxs[nlpivs-j] = alpividxs[nlpivs-(j+1)];

}

alpivlows[0] = candprc;

alpividxs[0] = candidx;

nlpivs++;

}

}

// -- dump inventory of high pivots for debugging

/*

for (k=0; k<nhpivs; k++) {

_trace("high pivot no. " + k

+ " at barindex: " + ahpividxs[k] + ", "

+ writeval(valuewhen(barindex()==ahpividxs[k],

datetime(), 1), formatdatetime)

+ ", " + ahpivhighs[k]);

}

*/

// -- ok, let's plot the pivots using arrows

plotshapes(

iif(ahpivs==1, shapedownarrow, shapenone), colorred, 0,

high, offset=-15);

plotshapes(

iif(alpivs==1, shapeuparrow , shapenone), colorgreen, 0,

low, offset=-15);

_section_end();

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