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Updating Custom Indicator Line Automatically

  • #1
  • First Post: Mar 4, 2009 2:03am Mar 4, 2009 2:03am
Hi,

I noticed that some custom indicators do not redraw themselves automatically to the new bars with every incoming tick or bar. Only when you first open the chart or when you click a different time frame and then chick back their lines get redrawn to the last bar.

So what is making them behave like that?

Going to Charts/Refresh or rightclicking Refresh doesn't help and adding WindowRedraw() to the code doesn't help either.

I've read that the problem may be that such indicator(s) use a limit, i.e. the IndicatorCounted() function severely limits the loop for the indicator in order to not repaint bars.

Here is an example of the limit in such an indicator:

PHP Code
   int i,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=Bars-Periods-1-counted_bars;
   //---- main loop
   for(i=limit; i>=0; i--) {


Thanks for providing a solution.
Free Programmer for Profitable Strategies
  • #2
  • Mar 4, 2009 6:11am Mar 4, 2009 6:11am
there is no logical reason for going back and recalculating bars every tick, the past is the past and should not change. Redoing them every tick will just bog down your computer with useless calculations.

But, if you want them to be recalculated everytime, set limit=Bars; If you want it to just do the new bars, set limit = Bars - counted_bars;
  • #3
  • Mar 4, 2009 6:22am Mar 4, 2009 6:22am
Of course I want it to just do the new bars because the indicator line for earlier bars is already plotted.

I wonder why the programmer has chosen

PHP Code
limit=Bars-Periods-1-counted_bars
?

Any Idea what he is trying toaccomplish?
Free Programmer for Profitable Strategies
  • #4
  • Mar 4, 2009 6:26am Mar 4, 2009 6:26am
I saw that, wasn't sure where the programmer was going with that. Maybe to skip the first few bars that may not have enough data to draw correctly but who cares about that. I would just change it to limit=Bars-counted_bars;
  • #5
  • Last Post: Mar 4, 2009 7:20am Mar 4, 2009 7:20am
Thanks for your help!
Free Programmer for Profitable Strategies
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