How to check if a drawobject exists?

[billy822]

Try to get rid of some repeating drawobjects. Is there a ninjascript or c# function like this:
boolean ExistsDrawObject(TagID).

Thanks in advance.

[Newshues]

I don't know if such does exist but I'd be surprised if it doesn't exist.

That said, I've written a couple of "target" drawing indicators where I want to know....say the mid point of the last swing or the 100% extension of the prior upswing after a retracement.

In those cases I also want to know a couple or a few of the prior "targets" but I also do not want to have targets painted all the way back to the beginning of the chart.

So, the solution I use is a simple toggle.

int toggle = 0;

toggle++; // on each instance of wanting to draw something

DrawDot("Tag" + (toggle % 3), 0, CCI(14)[0], Color.Red);

toggle % 3 means divide toggle by 3 and give me the remainder ( modulus math function ). So the numeric value being appended to "Tag" is always going to be 0,1 or 2 and as those cycle so to does the dot on the screen since C# will just remove the last instance of Tag0 and draw a new Tag0 at the new location.

It's an approach that reduces management but isn't right for all situations. Where I've used it I've set the divisor ( 3 in the example ) as a parameter I can adjust because at smaller time frames I may not want any targets but at larger ones I may want 4 or 5.

No idea if it is right for what you are doing, just tossing it out as an idea.

[billy822]

Newshues, thanks for sharing your idea. I'll use a variable to store the Currentbar of the Drawobject. A new Drawobject will be drawn only if my rules are passed && (new Currentbar - stored Currentbar) > 2. This will get rid of the 3 consecutive drawobjects in a row situation.

[NinjaTrader_Bertrand]

Thanks for the ideas guys, there is no collection of draw object tag Id's.