Pattern recognition

[twannster]

I am trying to recognize a certain pattern in a study (in this case CCI). Specifically, I would like to know when the CCI comes from above 100 and crosses through 0 without "backing up" meaning it has only gone in a down direction from a high above 100.

It was easy to determine when the CCI crosses thru zero. Is there an elegant way to recognize that it also has traveled from +100 down thru zero without having an up bar (or from below -100 to above zero without a down bar)?

here is the code that recognizes the zero crossover.

function main(Length,Source,Symbol,Interval,Upper,Lower,Par ams) {

if(bInit == false){

if(Symbol == null) Symbol = getSymbol();
if(Interval == null) Interval = getInterval();
var vSymbol = Symbol+","+Interval;
xCCI = cci(Length, eval(Source)(sym(vSymbol)));
setShowTitleParameters(eval(Params));
addBand( Upper, PS_DOT, 3, Color.red,"Upper");
addBand( Lower, PS_DOT, 3, Color.lime,"Lower");
addBand(0, PS_SOLID, 2, Color.black,"Zero");

bInit = true;

}

if (xCCI.getValue(-1) < 0 && xCCI.getValue(0) > 0) && {
setBarThickness(2);
setBarFgColor(Color.yellow);
}
else if (xCCI.getValue(-1) > 0 && xCCI.getValue(0) < 0) {
setBarThickness(2);
setBarFgColor(Color.red);
}
else {
setBarThickness(2);
setBarFgColor(Color.blue);
}

return getSeries(xCCI);
}

[Doji3333]

possible solution.

in my opinion, the easiest way to handle this is with a conditional mechanism that tracks the CCI.. Think of it like a little ongoing verification of the conditions you are looking for..

Here, I've tried to modify your code to do what you want..

//  Added new conditional mechanism variables.
var CCIConditional = 0;
  //  0 = neutral
  // 1 = below -100 and moved up continuously
  // -1 = above 100 and moved down continuously

function main(Length,Source,Symbol,Interval,Upper,Lower,Par
ams) {

if(bInit == false){
  if(Symbol == null) Symbol = getSymbol();
  if(Interval == null) Interval = getInterval();
  var vSymbol = Symbol+","+Interval;
  xCCI = cci(Length, eval(Source)(sym(vSymbol)));
  setShowTitleParameters(eval(Params));
  addBand( Upper, PS_DOT, 3, Color.red,"Upper");
  addBand( Lower, PS_DOT, 3, Color.lime,"Lower"); 
  addBand(0, PS_SOLID, 2, Color.black,"Zero");

  bInit = true;
}

if (xCCI.getValue(-1) < 0 && xCCI.getValue(0) > 0) && {
  setBarThickness(2);
  setBarFgColor(Color.yellow);
} else if (xCCI.getValue(-1) > 0 && xCCI.getValue(0) < 0) {
  setBarThickness(2);
  setBarFgColor(Color.red);
} else {
  setBarThickness(2);
  setBarFgColor(Color.blue);
}

if (xCCI.getValue(-1) <= -100) {
  //  meets our setup condition for #1
   CCIConditional = 1;
}
if ((xCCI.getValue(-1) > -100) && (CCIConditional > 0) &&  
    (xCCI.getValue(-1) < xCCI.getValue(-2)) ) {
  //  Fails to meet our continuous upward trending after #1
   CCIConditional = 0;
}

if (xCCI.getValue(-1) >= 100) {
  //  meets our setup condition for #-1
   CCIConditional = -1;
}
if ((xCCI.getValue(-1) < 100) && (CCIConditional < 0) &&  
    (xCCI.getValue(-1) > xCCI.getValue(-2)) ) {
  //  Fails to meet our continuous downward trending after #-1
   CCIConditional = 0;
}

//  Now all you have to do is look for one of these conditions and the cross above ZERO..

if ((xCCI.getValue(-1) < 0) && (CCIConditional < 0) ) {
  //  Meets our DOWNWARD condition with a cross below ZERO
  //  Do something
   CCIConditional = 0;
}
if ((xCCI.getValue(-1) > 0) && (CCIConditional > 0) ) {
  //  Meets our UPWARD condition with a cross above ZERO
  //  Do something
   CCIConditional = 0;
}


return getSeries(xCCI);
}