Counting number of past bars since price pattern occurrence

Quoting Chorlton

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Hello All, With regard to MQL4, I've trying to find out a way to count the number of bars on the chart that have passed since a particular price movement/pattern has occurred. As a simple example, how would I count the number of bars that has occurred since price last gapped up? I've been reading through the documentation but can't seem to find an appropriate function to use. In my old amibroker days, I would have used the AFL function, barssince. Any help would be welcome, Thanks, Chorlton

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Quoting Chorlton

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Hello All, With regard to MQL4, I've trying to find out a way to count the number of bars on the chart that have passed since a particular price movement/pattern has occurred. As a simple example, how would I count the number of bars that has occurred since price last gapped up? I've been reading through the documentation but can't seem to find an appropriate function to use. In my old amibroker days, I would have used the AFL function, barssince. Any help would be welcome, Thanks, Chorlton

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Quoting honestknave

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It certainly can be done, but the methodology will depend on your application. The current bar always has an index of 0. The previous bar is 1, the bar before that is 2 etc. So the bar index will always tell you how long ago it happened... e.g. Bar 43 happened 43 bars ago. This numbering style required the bar indices to change whenever a new bar is formed: The new bar becomes Bar 0... Bar 0 becomes Bar 1... Bar 1 becomes Bar 2 etc. See here for more information on the numbering system. If you want to find...

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Quoting Motiram

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{quote} Hello Chorlton in the link below is indicator ZigZagWithValue_Bars.mq4 which count the bars and zigzag pips is it what you are looking for http://www.forexfactory.com/showthre...09#post4384709 Regards, Moti

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Quoting Chorlton

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Hello All, With regard to MQL4, I've trying to find out a way to count the number of bars on the chart that have passed since a particular price movement/pattern has occurred. As a simple example, how would I count the number of bars that has occurred since price last gapped up? I've been reading through the documentation but can't seem to find an appropriate function to use. In my old amibroker days, I would have used the AFL function, barssince. Any help would be welcome, Thanks, Chorlton

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Quoting Chorlton

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{quote} Hi HonestKnave, Thank you for the detailed reply. As I'm slowly learning MQL4 would you be able to expand on (with maybe some actual code) how to use bar index to calculate how long ago a pattern occurred? If, for example, my pattern was basically a gap up in price GapUpPattern = iLow(NULL,0,1) > iHigh(NULL,0,2) How would I use the above with the bar index function to find out how many bars ago this happened?

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#property strict
#property indicator_chart_window
 
datetime LastGapUp=0;
 
int OnInit() { return(INIT_SUCCEEDED); }
 
void OnDeinit(const int reason) { Comment(""); }
 
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   int Limit=rates_total-1-MathMax(prev_calculated,2);
   for(int i=Limit; i>=0; i--)
     {
      if(low[i+1]>high[i+2]) { LastGapUp=time[i+1]; }
      int Bar=iBarShift(NULL,0,LastGapUp);
      string When=TimeToStr(LastGapUp);
      Comment(StringFormat("Last gap up was %i bars ago (at %s)",Bar,When));
     }
   return(rates_total);
  }

Quoting cyber1

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{quote} Chorlton- You will need to set up a nested "for loop". At each iteration of the main loop you will need to check for that condition.

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Quoting honestknave

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{quote} Here is some rough code which should give you an idea of the concept. The code runs once per bar. If the code finds a gap up pattern, the time is stored. Additionally, the comment is updated each bar to reflect how long ago the last pattern happened. Hope that helps #property strict #property indicator_chart_window datetime LastGapUp=0; int OnInit() { return(INIT_SUCCEEDED); } void OnDeinit(const int reason) { Comment(""); } int OnCalculate(const int rates_total, const int prev_calculated, const datetime &time[], const double &open[], const...

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