indicator goes off in strategy and messes up chart

[tkaboris]

I have a strategy that adds indicators but it meses up chart. From this screen it shows one of the ema reaches 0 point on the chart and it messses it up. How can i fix it? i think i configured it correctly.. Its while using market repaly...

private EMA fastEMA, slowEMA;

inset defaults:
FastEMAPeriod = 8;
SlowEMAPeriod = 34;

in dataloaded:
fastEMA = EMA(Close,FastEMAPeriod);
slowEMA = EMA(Close,SlowEMAPeriod);
fastEMA.Plots[0].Brush = Brushes.Blue;
slowEMA.Plots[0].Brush = Brushes.Cyan;
fastEMA.Plots[0].Width = 2;
slowEMA.Plots[0].Width = 3;
AddChartIndicator(fastEMA);
AddChartIndicator(slowEMA);

in the condition
fastEMA[0] > sloeEMA[0]

[NinjaTrader_Jesse]

Hello tkaboris,

From the given details I don't see what would be the problem. I would suggest to delete this script and start over by using the strategy builder, That will ensure that valid code is being used to add the indicators and pass data to the instances. To recreate what you have shown you would need to add two user inputs and then create a condition comparing the two indicators. After doing that you can test the strategy to see if you get the same result, if not you can unlock the code and work from there.

[tkaboris]

Jesse
it maybe related to Time issue? when chart messes up i see this message in log

in setdefaults i have
Start = DateTime.Parse("06:55", System.Globalization.CultureInfo.InvariantCulture) ;
End = DateTime.Parse("15:45", System.Globalization.CultureInfo.InvariantCulture) ;

and in condition i have
(Times[0][0].TimeOfDay >= Start.TimeOfDay) && (Times[0][0].TimeOfDay <= End.TimeOfDay)

[NinjaScriptProperty]
[PropertyEditor("NinjaTrader.Gui.Tools.TimeEditorKe y")]
[Display(Name = "Start Time", Order = 1, GroupName = "05. Trade Management")]
public DateTime Start
{ get; set; }

Maybe something is wrong here?
I was getting this code from strategy builder when first created strategy...

[NinjaTrader_Jesse]

Hello tkaboris,

I really couldn't say, to make sure you have valid code I would highly suggest using the strategy builder to re generate the file and re test in a new file without other logic you have added.

The error in the image generally happens if you try to re enable a strategy that was used in a different mode, for example you applied a strategy in playback and now tried to re enable it using a live connection. You need to remove and re apply strategies when testing between different connections.

[QuantKey_Bruce]

tkaboris You should read this thread https://forum.ninjatrader.com/forum/...atabase-errors - what these things seemingly have in common is you're creating DateTimes that have a "Kind" that is not what is expected, and subsequently, the SQLite database seemingly encounters errors.

[tkaboris]

QuantKey_Bruce
if this is an issue how do i modify it? its uses offset and I need user selection to selct time
"DateTimeOffset.Now.AddDays().DateTime"

my code regarding Time

Start = DateTime.Parse("06:55", System.Globalization.CultureInfo.InvariantCulture) ;
End = DateTime.Parse("15:45", System.Globalization.CultureInfo.InvariantCulture) ;

Condition
(Times[0][0].TimeOfDay >= Start.TimeOfDay) && (Times[0][0].TimeOfDay <= End.TimeOfDay)

[NinjaScriptProperty]
[PropertyEditor("NinjaTrader.Gui.Tools.TimeEditorKe y")]
[Display(Name = "Start Time", Order = 1, GroupName = "05. Trade Management")]
public DateTime Start
{ get; set; }

[NinjaScriptProperty]
[PropertyEditor("NinjaTrader.Gui.Tools.TimeEditorKe y")]
[Display(Name = "End Time", Order = 2, GroupName = "05. Trade Management")]
public DateTime End
{ get; set; }

[QuantKey_Bruce]

NinjaTrader support would have to look into the issue of why, seemingly, two different users are manipulating DateTimes and subsequently the database has error messages. These things do not seem related, yet, it seems wise to be suspicious of coincidence.

[QuantKey_Bruce]

Also, the thread I referenced has a reasonable suggestion for a workaround - use .DateTime before you submit any orders with SubmitOrder to get a kind of unknown on the datetimes - if you're not using SubmitOrder I'm not certain there's commonality between the two issues but it seems uncanny that two people are using a time picker in the UI and subsequently have database errors and that these are the two top reports on a search for the error message in question. What are the chances?

[NinjaTrader_ChelseaB]

Hello tkaboris,

The error and code do not appear to be related.

To confirm, if you remove all logic in OnBarUpdate() and just keep the inputs and print the values of these in OnBarUpdate(), does the error continue?

Note, use XmlIgnore() on DataTime and TimeSpan public variables.

https://ninjatrader.com/support/helpGuides/nt8/xmlignoreattribute.htm

https://forum.ninjatrader.com/forum/historical-beta-archive/version-8-beta/79414-using-timespan-as-a-parameter

[tkaboris]

Do you mean xmlignore like this?

[XmlIgnore()]
[NinjaScriptProperty]
[PropertyEditor("NinjaTrader.Gui.Tools.TimeEditorKe y")]
[Display(Name = "Start Time", Order = 1, GroupName = "05. Trade Management")]
public DateTime Start
{ get; set; }

[XmlIgnore()]
[NinjaScriptProperty]
[PropertyEditor("NinjaTrader.Gui.Tools.TimeEditorKe y")]
[Display(Name = "End Time", Order = 2, GroupName = "05. Trade Management")]
public DateTime End
{ get; set; }

[NinjaTrader_ChelseaB]

Hello tkaboris,

Yes, this is correct.

DateTime objects cannot be auto serialized so require the XmlIgnore attribute. (You can also serialize using a string property if you want to save the value as demonstrated in the forum post I linked)