Shadows created by DrawRegion

[Harry]

Quite often, when using DrawRegion() there are shadows.

Any methods to get rid of those?

[NinjaTrader_Bertrand]

HI Harry, unfortunately none that I'm aware of - can you perhaps share the script producing this issue so I can check into here?

Thanks

[bukkan]

in initialize put this code

MaximumBarsLookBack = MaximumBarsLookBack.Infinite;

[NinjaTrader_Bertrand]

Thanks bukkan, however I was not able to see this happening on my end, tried this sample DrawRegion script with hardcoded lookback to infinite - http://www.ninjatrader.com/support/f...ead.php?t=4331

Can you please try this, too and see if it would draw as expected?

Thanks

[bukkan]

Bertrand,
if you filter the region like

if (Time[0] > new DateTime(2010,8,1))
{
DrawRegion(...)
}

this will bring the shadow if maximum lookback is not set to infinity. thats what i encountered when i tried to drawregion sometimes back.

[NinjaTrader_Bertrand]

Thanks, however I could not reproduce an issue here with my filtered DrawRegion calls like you outlined - is their any DataSeries variable involved that would contain perhaps a dummy value at this point in time and hence needed to be filtered before passed to DrawRegion?

[bukkan]

this indicator do not have max lookback set to infinity. if you apply the same and scroll back you will see a shadow. if maxlook is set to infinite then it behaves ok.

regards

[bukkan]

3. Should you be drawing regions based on DataSeries objects instead of indicator plots, be sure to create the DataSeries with the MaximumBarsLookBack.Infinite parameter if the region you are drawing would be maintained on the chart for more than 256 bars back.

the help files too warns about this.

[NinjaTrader_Bertrand]

Thanks for the sample, however toggling between Infinite and 256 setting would show exactly the expected differences as noted in the helpguide you cited.

[bukkan]

yes Mindset is perhaps also facing the same expected issue (and he must have set the null data series to 0, thats y the tail). but then nothing can be said in concrete unless he post his code.

thanks

[NinjaTrader_Bertrand]

If anybody runs into an unexpected outcome based on the previous info posted here, please either post your code demonstrating the issue or send us a note to support at ninjatrader dot com and reference this thread so we can check into.

Thanks for the support.

[Harry]

Sorry, was my own fault!

The shadow was my own fault, discoverd this today.

However, DrawRegion() will not always work correctly with NT7, if Maximum bars look back is set to "TwoHundredFiftySix". This is as expected, and it will display correctly, once you change it to "Infinite". That is due to the trade-off between RAM use and perfection.

[Harry]

DrawRegion plotting convex rectangles

I use DrawRegion to color the opening range and the night session range.

The fill between the two horizontal lines looks a bit like Baloo, the bear.

[NinjaTrader_Bertrand]

Harry, can you please share the code so I can look into on my end? Were you using Infinite or 256 for the DataSeries?

[Harry]

Problem is independent from Infinite/256 lookback.

I have coded an indicator by adding just a few lines to the native NinjaTrader pivots indicator. Chart and indicator attached.

The problem:

When I reset the two data series that contain the region to be drawn, DrawRegion plots a triangle from the upper and lower border of the region to price (next bar). When the dataseries changes back from Reset() to display a value, DrawRegion draws a reverse triangle from price to the upper and lower border.

The region gets a convex shape, or in the chart below, an appearance like a speech balloon.