Gap Up/Down Alert

[aktrdr071]

How can I set an Market Analyzer alert for a instrument that opens above yesterday's high price or opens below yesterdays low????!!! I have been searching the help guides and other forum posts to no avail. Any help is appreciated!

[NinjaTrader_RyanM1]

Hello aktrdr071,

Thanks for posting and welcome to the NT forums. This type of alert requires custom programming to create for the market analyzer. You can setup alerts and filters there, based on the indicators plot value. A common approach is setting a plot value of 1 when your condition is true and 0 otherwise. You can then be alerted when the column (indicator) value == 1.

One way to do this with your condition in NinjaScript is with the snippet below:

if (CurrentDayOHL().CurrentOpen[0] > PriorDayOHLC().PriorHigh[0] || CurrentDayOHL().CurrentOpen[0] < PriorDayOHLC().PriorLow[0])
	Value.Set(1);
			
else Value.Set(0);

The indicator is created using Tools > New NinjaScript > indicator menu and then configured in the market analyzer. See here for help working with columns there:

http://www.ninjatrader.com/support/helpGuides/nt7/working_with_columns.htm

See here for help working with alert, filter, and cell conditions.

http://www.ninjatrader.com/support/helpGuides/nt7/creating_alert__cell_and_filte.htm

[aktrdr071]

Thanks Ryan,

So if I understand correctly, I will need to create a new indicator that returns a value of 1 or 0 based on a formula like yours below in the Ninjascript editor? How and where will I enter a code snippet?

[NinjaTrader_RyanM1]

Yes, that's it. To create a new indicator Click Tools > New NinjaScript > Indicator. Click Next to advance through the wizard to customize its name, plots and input parameters if needed.

Click Generate to have it create the basic indicator structure. The snippet can be pasted exactly as it is, inbetween the two brackets { } of OnBarUpdate, like:

protected override void OnBarUpdate()
{
if (CurrentDayOHL().CurrentOpen[0] > PriorDayOHLC().PriorHigh[0] || CurrentDayOHL().CurrentOpen[0] < PriorDayOHLC().PriorLow[0])
	Value.Set(1);
	
else Value.Set(0);
}

If you want to get started with indicator development in NinjaTrader, the following tutorials are helpful for explaining the structure and introducing the basics.

http://www.ninjatrader.com/support/helpGuides/nt7/developing_indicators.htm

[aktrdr071]

Great! Thanks Ryan

[cfree5119]

Is there a way to not make an alert but to pull all the stocks that meet a given requirement in the if function and put them into a preset instrument list that is every changing?

[NinjaTrader_RyanM1]

Yes, that would be considered a market analyzer filter. The setup and conditions work the same as alerts, but filters only show those instruments meeting the requirements you set. More information on filters is available here:

http://www.ninjatrader.com/support/helpGuides/nt7/creating_alert__cell_and_filte.htm

[cfree5119]

I have now see how to do this. Can it be done for only a group of labeled instruments? For instance, if I have my positions, and the NASDAQ 100, can I only run my filter on the NASDAQ 100 although only one market analyzer is open? Thank you.

[NinjaTrader_RyanM1]

The filter would check all instruments in that particular market analyzer window. It's easy to add a list of instruments to the MA window, and NASDAQ 100 is a built-in list. Right Click > Add Instrument List > NASDAQ 100 to add all instruments.

[cfree5119]

10-4. That is what I thought. Thank you.

[cfree5119]

This is my indicator I created. I cannot return any results when I setup it up under columns and hide all values that equal zero. Please help? Thank you.

[NinjaTrader_RyanM1]

Sure, I'll take a look. Nothing was attached yet in the previous post.

[cfree5119]

Forgive me.... here is the code.

    [Description("")]
    public class DonchianChannelSDLongScan : Indicator
    {
        #region Variables

        #endregion

        protected override void Initialize()
        {
            Overlay				= false;
        }
        protected override void OnBarUpdate()
        {
			if (Close[0] >= MAX(High, 504)[1])
				Value.Set(1);
			else
				Value.Set(0);
        }

        #region Properties

        #endregion
    }
}

[NinjaTrader_RyanM1]

Thanks for posting that. A few things you would want to check:

The bars to load setting for the indicator needs to be enough, greater than 504.

You are using a lookback greater than 256, so also need to make sure you have Maximum Bars Looback set to Infinite.

Check the Row filter is enabled from the Right Click context menu. - From the main Market Analyzer screen.

[cfree5119]

It is still returning 0 results. Here are screenshots of my inputs.