SuperDOM MarketDepth Column

[KINGKODA]

Hello,

I am trying to create a SuperDom column that would display MarketDepth as a profile. I found information on getting MarketDepth from https://ninjatrader.com/support/help...on_builder.htm but I don't know how to go about this.

Any advice is greatly appreciated.

[NinjaTrader_PaulH]

Hello KINGKODA,

Thanks for your post.

If you add the existing Volume column to the Superdom and then change the "type" from "Standard" to "BuySell" and tick "show volume text" that would show the buy/sell volume at each price level (Volume profile). You can use the code of the existing Volume Column as perhaps a starting point.and subscribe to market depth data: https://ninjatrader.com/support/help...arketdepth.htm

If you need assistance in creating your column, we can provide references to 3rd party programmers who could meet your needs.

[NinjaTrader_PaulH]

Hello KINGKODA,

I also wanted to add the references to the help guide for superdom ninjascript: https://ninjatrader.com/support/help...dom_column.htm

[KINGKODA]

Thank you very much Paul!

[KINGKODA]

I have not been able to produce any results on NinjaScript Output.

Here is my code so far.

private SortedDictionary<double, long> Asks;
private SortedDictionary<double, long> Bids;
private MarketDepth<MarketDepthRow> marketDepth;

private void OnMarketDepth(object sender, MarketDepthEventArgs e)
{
     for (int i = 0; i < marketDepth.Asks.Count; i++)
     {Asks.Add(marketDepth.Asks[i].Price, marketDepth.Asks[i].Volume);}

     for (int i = 0; i < marketDepth.Bids.Count; i++)
     {Bids.Add(marketDepth.Bids[i].Price, marketDepth.Bids[i].Volume);}
}

private void OnBarsUpdate(object sender, BarsUpdateEventArgs e)
{
     foreach(KeyValuePair<double,long> kvp in Asks)
     {Print(string.Format("Asks Price: {0} Volume: {1}", kvp.Key, kvp.Value));}

     foreach(KeyValuePair<double,long> kvp in Bids)
     {Print(string.Format(" Bids Price: {0} Volume: {1}", kvp.Key, kvp.Value));}
}

Any advice?

[NinjaTrader_PaulH]

Hello KINGKODA,

Thanks for your reply.

Do you have any compile errors?

If not, do you have any run time errors (as would be found in the "log" tab of the control center)?

You may want to use additional prints to find out where in the script you have any errors are occurring.

[KINGKODA]

The error is coming from the Add to SortedDictionary section.

[NinjaTrader_PaulH]

Hello KINGKODA,

Thanks for your reply.

Is this a compile error or a run-time error?

Can you provide the error message?

[KINGKODA]

Error Message:

Failed to call 'Add' method: System.NullReferenceException: Object reference not set to an instance of an object.
at NinjaTrader.NinjaScript.SuperDomColumns.Profile.On BarsUpdate(Object sender, BarsUpdateEventArgs e)
at NinjaTrader.Data.BarsRequest.OnBarsUpdate(Object sender, BarsUpdateEventArgs e)
at NinjaTrader.Data.BarsSeries.Add(Bars bars, Double open, Double high, Double low, Double close, DateTime time, Int64 volume, Double tickSize, Boolean isBar, Double bid, Double ask)

[NinjaTrader_PaulH]

Hello KINGKODA,

Thanks for your reply.

I do not see where that error relates to the code you have provided.

If I may suggest starting with a new superdom column, as created by the Ninjascript wizard. and then test with the example in the help guide here: https://ninjatrader.com/support/help...arketdepth.htm