Drawing Object Count Limit

[ChrisR]

Good Evening,

When adding values to a drawing object names to get additional objects drawn, such as

"Name"+CurrentBar

What would be the appropriate way to limit the amount of drawing objects drawn while ensuring they are the most recent ones? Say I want to draw only 5 objects, the most recent 5 out of the entire series that exists. Since Objects are draw from left to right in the sequence of bar loading, using a counter such as below, wouldnt work because it would draw the first 5, not the recent 5.

if (condition)
draw object;
nCount = nCount + 1;


"Name"+nCount

What other method would solve this?

[QuantKey_Bruce]

If you only want to keep the most recent 100, you could do something like "Name" + (CurrentBar % 100).

You also could keep track of the ones you've added in a list so you can delete them later (or perhaps, just delete them one at a time e.g. if (DrawingCount > 100) RemoveDrawObject("Name" + (DrawingCount - 100)); but the modulus approach is a bit more compact.

[NinjaTrader_ChrisL]

Hi ChrisR, thanks for your question. One way to do it would be to keep a counter and reset it once it gets to 5 e.g.

//class level
private int myCounter = 0;

//OnBarUpdate

if(myCounter >= 5)
    myCounter = 0;

if(condition to draw)
{
     Draw("Tag "+ myCounter)
     myCounter++
}