indicator processing manually drawn Ray before the user finishes the draw

[llanqui]

have an indicator that is processing OnPriceChange

when I hand draw a Ray my indicator starts recognizing the Ray before I'm finished drawing it.....and the anchors are this

StartAnchor.BarsAgo = -2147483648
EndAnchor.BarsAgo = -2147483648

what is going on???

[QuantKey_Bruce]

Because you haven't let go yet. Just check for that in the indicator. If BarsAgo is int.MinValue it isn't set yet.

[llanqui]

Wow...didn't expect that behavior...thank you.

[NinjaTrader_BrandonH]

Hello llanqui,

Thanks for your post.

QuantKey_Bruce is correct in stating that this is due the not letting go of the mouse to finish drawing the object yet when the indicator processes logic.

The workaround that QuantKey_Bruce provided could likely be used to check for this in the indicator.

Please let us know if we may assist further.

[llanqui]

Hello...well, can you please take a look at this code...it looks right to me but returns the negative BarsAgo even after the mouse is up

protected override void OnBarUpdate()
{
if (State == State.Historical)
return;

foreach (DrawingTool draw in DrawObjects.ToList())
{
// select User Drawn Horizontal or Ray Lines
if (draw.IsUserDrawn)
{
if (draw is DrawingTools.Ray)
{
DrawingTools.Ray thisRay = draw as DrawingTools.Ray;

Print
(
"-----------------------------------------------------------------------" +
Environment.NewLine +
"thisRay.StartAnchor.BarsAgo = " + thisRay.StartAnchor.BarsAgo.ToString() +
" ... " +
"thisRay.EndAnchor.BarsAgo) = " + thisRay.EndAnchor.BarsAgo.ToString()
);
}
}
}
}

}
}

[NinjaTrader_BrandonH]

Hello llanqui,

Thanks for your note.

Since you are detecting manually drawn rays in your script, you will need to use <ChartAnchor>.SlotIndex instead of BarsAgo. This is because BarsAgo cannot be used on manually drawn lines.

For example, the code might look something like this:

foreach (DrawingTool draw in DrawObjects.ToList())
{
    if (draw.IsUserDrawn)
    {
        if (draw is DrawingTools.Ray)
        {
            DrawingTools.Ray thisRay = draw as DrawingTools.Ray;
            Print("-------------------");
            Print("thisRay.StartAnchor.SlotIndex: " + thisRay.StartAnchor.SlotIndex);
            Print("thisRay.EndAnchor.SlotIndex: " + thisRay.EndAnchor.SlotIndex);
        }
    }
}

See the help guide documentation below for more information about SlotIndex.

SlotIndex: https://ninjatrader.com/support/help...l?barindex.htm
IDrawingTools ChartAnchors: https://ninjatrader.com/support/help...tm#chartanchor

[llanqui]

Ok, is this documented somewhere??? I have a hard time finding what I need in the online help...

[llanqui]

Oh, sorry, I didn't see your last rererences..that answers this

[llanqui]

Is there a way I can convert SlotIndex to BarsAgo?

[llanqui]

would BarsAgo = CurrentBar - SlotIndex ?? for a single series chart?

[NinjaTrader_BrandonH]

Hello llanqui,

Thanks for your note.

Yes, since the SlotIndex returns a bar index value you could subtract the <ChartAnchor>.SlotIndex value from CurrentBar to get the BarsAgo value of a drawing object's ChartAnchor.

For example, say thisRay.EndAnchor.SlotIndex returns a bar index value of 90 and the CurrentBar on the chart is bar 100.

You could subtract the SlotIndex value from CurrentBar to get a BarsAgo value of 10 (100 - 90 = 10).

The code might look something like this:

double rayBarsAgo = CurrentBar - thisRay.EndAnchor.SlotIndex;

Please let me know if you have further questions on this topic.

[llanqui]

yes, that works...thank you