Setting Default Values for Parameters

[harr5754]

Hello NT guys,

I've been able to call out parameters in my Ninjascripts that show up in the Strategy Analyzer. I would now like to set up default values and still be able to change them in the Strategy Analyzer. The following code is how I'm getting the parameters to show up:

[NinjaScriptProperty]
[Description("imethod")]
[Category("Parameters")]
public int imethod
{ get; set; }

protected override void OnBarUpdate()
{
if (CurrentBar < BarsRequiredToTrade)
return;

Would appreciate any guidance.

Thanks,
Ben

[NinjaTrader_BrandonH]

Hello harr5754,

Thanks for your post.

You could set up a NinjaScript property like in the code you shared. To set a default value for the NinjaScript properties, you would assign a value to the property in OnStateChange() when the state reaches State.SetDefaults.

For example, if you are creating an int property named imethod and you want to set a default value of 5 for imethod, you would do the following.

protected override void OnStateChange()
{
    if (State == State.SetDefaults)
    {
        imethod = 5;
    }
}

This could be seen by setting up user input variables in the Strategy Builder and clicking the 'View code' button the view the code that accomplishes this.

See this help guide for more information about creating user input variables in the Strategy Builder: https://ninjatrader.com/support/help...ariablesScreen

Let us know if we may assist further.

[harr5754]

Hi Brandon,

It still doesn't want to show default values when I pull it up in Strategy Analyzer. He is more of the script I'm working on just in case I buggered it up elsewhere:

 public class EntryTest01TradeThePullback : Strategy
{
protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"Entry #1 – Trade The Pullback";
Name = "EntryTest01TradeThePullback";
Calculate = Calculate.OnBarClose;
EntriesPerDirection = 1;
EntryHandling = EntryHandling.AllEntries;
IsExitOnSessionCloseStrategy = true;
ExitOnSessionCloseSeconds = 30;
IsFillLimitOnTouch = false;
MaximumBarsLookBack = MaximumBarsLookBack.TwoHundredFiftySix;
OrderFillResolution = OrderFillResolution.Standard;
Slippage = 0;
StartBehavior = StartBehavior.WaitUntilFlat;
TimeInForce = TimeInForce.Gtc;
TraceOrders = false;
RealtimeErrorHandling = RealtimeErrorHandling.StopCancelClose;
StopTargetHandling = StopTargetHandling.PerEntryExecution;
BarsRequiredToTrade = 20;
IsInstantiatedOnEachOptimizationIteration = true;
[COLOR=#2980b9][B]entry1_sl = 5;
entry1_slx = 20;
bse = 5;
imethod = 1;[/B][/COLOR]
}
else if (State == State.Configure)
{

}
}

[NinjaScriptProperty]
[Description("entry1_sl")]
[Category("Parameters")]
public int entry1_sl
{ get; set; }

[NinjaScriptProperty]
[Description("entry1_slx")]
[Category("Parameters")]
public int entry1_slx
{ get; set; }

[NinjaScriptProperty]
[Description("bse")]
[Category("Parameters")]
public int bse
{ get; set; }

[NinjaScriptProperty]
[Description("imethod")]
[Category("Parameters")]
public int imethod
{ get; set; }

protected override void OnBarUpdate()
{
if (CurrentBar < BarsRequiredToTrade)
return;

if (Close[0] > Close[entry1_sl] && Close[0] < Close[entry1_slx])
EnterLong();
if (Close[0] < Close[entry1_sl] && Close[0] > Close[entry1_slx])
EnterShort();

if(imethod == 1 && BarsSinceEntryExecution() >= bse)
{
ExitLong();
ExitShort();
}

//exit after specified number of bars, ONLY if position is currently profitable
if (imethod == 2 && BarsSinceEntryExecution() >= bse
&& Position.GetUnrealizedProfitLoss(PerformanceUnit.C urrency) > 0)
{
ExitLong();
ExitShort();
}

//exit after specified number of bars, ONLY if position is currently losing
if (imethod == 3 && BarsSinceEntryExecution() >= bse
&& Position.GetUnrealizedProfitLoss(PerformanceUnit.C urrency) < 0)
{
ExitLong();
ExitShort();
}

Looking forward to your response,
Thanks,
Ben

[UltraNIX]

I think that there may be an issue, if you saved your workspace and exited Ninja, so as long as you don't switch strategies in Strategy Analyzer, if you had any different values before setting those default, you will still see previous values, even though script has different default values.

If that is the case, switch to different strategy and back to this strategy, it should help. Or you could just close NT8->delete all the files in strategyanalyzerlogs folder->Reload NT8. Unless, you saved a default template with different values than what are in the script, you should be good to go.

[harr5754]

I tried deleted all the files in the strategyanalyzerlogs folder and I am stilling getting "0's" coming up for the parameters instead of the ones in the script. I have not saved any default templates either. Strange.

[UltraNIX]

I tried deleted all the files in the strategyanalyzerlogs folder and I am stilling getting "0's" coming up for the parameters instead of the ones in the script. I have not saved any default templates either. Strange.

I think I know what your problem is. You don't have Properties region.

YOu should have this code in your script:

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(ResourceType = typeof(Custom.Resource), Name="entry1_sl")]
public int entry1_sl
{ get; set; }

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(ResourceType = typeof(Custom.Resource), Name="entry1_slx")]
public int entry1_slx
{ get; set; }

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(ResourceType = typeof(Custom.Resource), Name="bse")]
public int bse
{ get; set; }

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(ResourceType = typeof(Custom.Resource), Name="imethod")]
public int imethod
{ get; set; }

Tell me if it helped.

[s.kinra]

Hello harr5754,
Use the below example for properties:-

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(Name="Period", Order=1, GroupName="Parameters")]
public int Period
{ get; set; }

Hope it helps!

[harr5754]

Hi UltraNIX,

I double checked the code I was running through the analyzer and it was different,...my mistake. It works now.

However, I do have a question about the Properties Region you mentioned. Should I be putting all the blocks starting with "[NinjaScriptProperty]" down in the properties region?

I appreciate yours and Brandon's help.
Ben

[UltraNIX]

Hi UltraNIX,

I double checked the code I was running through the analyzer and it was different,...my mistake. It works now.

However, I do have a question about the Properties Region you mentioned. Should I be putting all the blocks starting with "[NinjaScriptProperty]" down in the properties region?

I appreciate yours and Brandon's help.
Ben

I think it's enough to just paste my code. And if you added more parameters, be sure, you have corresponding [NinjaScriptProperty] properties. If you don't, you will get 0's again