Deleting Objects on only one chart

I have code that draws object on the chart. I want to delete the objects with a hot key that is assigned within the code. When I do this, the object is deleted from all the charts, not just the chart I'm working with.

How do I prevent the ObjectDelete("myobject") from deleting myobject on all charts? Should I add the symbol to the object name or is there a chartID I can use so that when I make the object it has a unique name on each chart?

If I use the symbol name, make the object, change the symbol.... the object delete wont work. Unless I use a static var?

Tipster

I have never witnessed this behaviour. I have created and deleted objects via scripts on charts and they have always only affected the active chart.

In fact, I just ran an experiment to confirm my statements. I created Arrow objects on 2 charts. I created a cleanup script with this line of code and ran it on a third chart. It didn't remove any objects on the 2 other charts. I ran it on one of the charts containing objects and it deleted them as expected.

if (ObjectsTotal(OBJ_ARROW) > 0) ObjectsDeleteAll(0, OBJ_ARROW);


I would expect to see the same behaviour if I had used ObjectDelete() rather than ObjectDeleteAll().

What I want it to do: Only reset lines on one chart.
What it is doing: resetting lines on all charts.

Here's some code to try out, attach as an EA to 2 different charts (different pairs). After a few ticks it will draw some lines, if not, press the left mouse button and T at the same time.

Now drag the lines around on both charts messing them up good. On one of the charts, press the left mouse button and the T key at the same time to reset the lines on the chart. For some reason, it does it to all the other charts as well.

Maybe it's the key combination?

I've even added some code to put the "WindowHandler" number as part of the line name.

Anyone have any idea?

Thanks for the effort! I've attached a file in the post above, can you give it a try and see if it behaves similar on you machine? I tried it on two different installs of MT4.

I noticed your EA contains a DLL. On principle, I don't load code like this on my machine unless I have completed a thorough code review. So I don't care to try it out.

From the details you provided, I dare say you are trying things that few have attempted before. My theory is that the Hot Key sequence is being handled by all EAs and not just the "active" one. If I am right, the code is doing exactly what it supposed to do. In Windows programming languages there are sophisticated key stroke handling functions that give you some control. Whether that level of control is available in MT4 is questionable. Again at the risk of being repetitive, you are trying things few have done before.

Good luck.

what you've done works like it should, just not the way you want. although it only worked half the time for me... think of an indicator say ma. you put that on two screens with a color of green coded into the indicator with no user adjustments. you now have two charts with a green line. Now you go into the code and change the green to red, when you compile it will change both the charts to red... that is what your vt code is doing, the ea does not differentiate between the charts it will change anything it finds coded like that vt setting.
what you need to do is make a user defined setting that you can change each time you place the ea on a chart. much the same way a magic number or ticket order number would work. this will make the ea look for something with just that setting to change.
the easiest way ,maybe to define the hot key itself, each chart could have its own key chosen in the user panel. you could also do a true false if just two charts. true is one key and false is another. maybe look at changing the object name for each chart you use, define it by the chart pair. anyway there is some thought for you to look into..

good luck

Thanks for your info. I've given up on it. I'll wait for MT5 to catch on and do it right on that platform. For now I've got it working a different way, so this won't be a problem anymore. Thanks.

sorry, resurrecting an old thread that i came across.

i suspect the way to go about this is only by using a script which you drag and drop onto whichever chart you wish to affect. the code would be extremely simple, but the whole concept is not as "nice" as being able to just use a hotkey.