Cumulative Delta Strategy Logic

[sdauteuil]

I am creating a strategy where one of the conditions to enter a trade is that the order flow cumulative delta is greater than a variable named "DeltaVolume"


I am trying to follow the example in the help guide

https://ninjatrader.com/support/helpGuides/nt8/?order_flow_cumulative_delta.htm

There are two samples one for calling the method directly and one by reference, I am not sure what the difference is.

I am getting error on compiling
Operator > cannot be applied to operands of type ninjatrader.ninjascript.indicators

I have attached some screenshots of the code and the strategy itself.

Any help will be appreciated

[NinjaTrader_ChrisL]

Hello sdauteuil, thanks for writing in.

Calling the OrderFlowCumulativeDelta by reference is better because you are not re-creating the cumulative delta object every time you call it. The problem with the code is you are not referencing which delta value series you want. The choices are: DeltaClose, DeltaOpen, DeltaHigh, and DeltaLow.

Try printing out some values from the series e.g.

Print(cumulativeDelta.DeltaClose[0]); // the most recent delta close update.

Please let me know if you have any questions on this material.

[sdauteuil]

Not exactly sure where I need to add the DeltaClose or if I am using the right syntax

I tried in the logic under onBarUpdate that is giving errors when compiling

if ((Close[0] > SMA1[0])
&& (Close[0] > Close[1]))

&& (cumulativeDelta.DeltaClose[0] > DeltaVolume))

*

I also tried to add it in the variable definition which caused errors

private OrderFlowCumulativeDelta.DeltaClose cumulativeDelta;

*

I tried to change the code under state.dataloaded - I get cannot convert to double error

cumulativeDelta = OrderFlowCumulativeDelta(BarsArray[0], CumulativeDeltaType.BidAsk, CumulativeDeltaPeriod.Bar, 0).DeltaClose[0];


I am trying to learn how to program - still working on where and how to declare variables

Thanks for the help

[NinjaTrader_ChrisL]

Hello sdauteuil, thanks for your reply.

Remove DeltaClose[0] from cumulativeDelta = OrderFlowCumulativeDelta(BarsArray[0], CumulativeDeltaType.BidAsk, CumulativeDeltaPeriod.Bar, 0).DeltaClose[0];

This DataLoaded stage is used to initialize the cumulativeDelta object. The data access must take place in OnBarUpdate.

Please let me know if I can assist any further.

[sdauteuil]

Thanks for that

In the previous post you said I needed to add DeltaClose somewhere in the code.
Where would that be added?

Calling the OrderFlowCumulativeDelta by reference is better because you are not re-creating the cumulative delta object every time you call it. The problem with the code is you are not referencing which delta value series you want. The choices are: DeltaClose, DeltaOpen, DeltaHigh, and DeltaLow.

[NinjaTrader_ChrisL]

Hello sdauteuil, thanks for your reply.

Please follow the example from the help guide page on using this indicator. Consider starting with a test script that only includes this indicator so you can see the data it provides:

https://ninjatrader.com/support/helpGuides/nt8/?order_flow_cumulative_delta2.htm

"Calling the OrderFlowCumulativeDelta() method by reference"

I have included a test indicator in this post, please see attached.

If you have any further questions please let me know.

[sdauteuil]

That helped got the code working with no errors.

When I run your indicator in the output window it matches the order flow indicator that comes with NT perfectly

In the output window the strategy has the same time stamp as the indicator but the DeltaClose value matches the previous indicator value.
(it is actually just slightly different from previous bar but close enough)

Basically the strategy is behind by one bar.

[sdauteuil]

I did try to access the secondary series by adding [1] to the code but I am getting error "cannot apply expression[] to a double"

cumulativeDelta.DeltaClose[1][0] > DeltaVolume

[sdauteuil]

Apparently it is working properly

When I moved the print statement with entry execution the value in the output window matches the indicator.

[NinjaTrader_ChrisL]

Hello sdauteuil,

If you need to have the most recent value from the Cumulative Delta indicator your script must run OnEachTick (Calculate == Calculate.OnEachTick). When it runs OnBarClose you will get the value of the last closed bar.

Please let me know if I can assist any further.