How to do variable assignment in StrategyBuilder and Use it in Condition

[futtrader]

I am trying to do something like below in Strategybuilder.

User Inputs:
FastEMA = 5
SlowEMA = 10
Multipler = 1.25

User Variables:
EMA1
EMA2
BuyCondition


I want to do the assignment like

EMA1 = EMA(FastEMA)
EMA2 = EMA(SlowEMA)
BuyCondition = EMA > EMA2 && ATR * Multipler


In Condition Wizard

I just want to use

if All:

BuyCondition
SMA(50) > Close



I know I can handle the buy condition without declaring as Variable inside the condition wizard but I specially want to do as the Variable assignment so better code management.

Attached is the snapshot

[NinjaTrader_Jesse]

Hello futtrader,

In order to use a variable as part of the condition you would need to use a second set. A first set could set the variable to the value you wanted and then a second set could check for that variables value and then reset the vraile to toggle it back off.

[futtrader]

Hello futtrader,

In order to use a variable as part of the condition you would need to use a second set. A first set could set the variable to the value you wanted and then a second set could check for that variables value and then reset the vraile to toggle it back off.

Sorry I did not get this

that variables value and then reset the vraile to toggle it back off.

Can you give small example video/snapshot to understand this.

[NinjaTrader_Emily]

Sorry I did not get this

that variables value and then reset the vraile to toggle it back off.

Can you give small example video/snapshot to understand this.

The Strategy Builder only allows for the following variable types: Bool, Double, String, Int, and Time. This means you would not be able to create variables for EMA1 and EMA2, though you could certainly still use FastEMA and SlowEMA as user inputs for the periods similar to this tutorial example:

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

Since a bool variable is an option, you could set up a variable for BuyCondition that toggles to true when the condition is met and false when the condition is not met. Here are some screenshot examples of how you would set up the Conditions and Actions set to set BuyCondition to true, a set to toggle it to false, and a way to check in a separate set if it is true as part of the conditions:

• Inputs and Variables screen - https://www.screencast.com/t/TePU4op1c
• Set 1 - https://www.screencast.com/t/PgLAp9zWAoV
• Set 2 - https://www.screencast.com/t/dWkkYpvq3
• Set 3 - https://www.screencast.com/t/DtBuHmySFLK4

I have also exported and attached the example to this post, which you could use as a shell for your strategy or copy the ideas into your own strategy. The example may be imported at Control Center > Tools > Import > NinjaScript AddOn and then you may view it in the Strategy Builder and click through the screens or open up each condition to see further how they are configured.

Please let us know if we may be of further assistance.

[futtrader]

Thanks this is good to start. So for EMA I can see code is creating EMA1 and EMA2 variable.

is it possible to use EMA1 and EMA2 variable directly in strategy builder - if I decide to use it in 10 different place .

or evertime when I need to use EMA for fast and slow I must have to use it through Indictor EMA set fast/slow ?

Basically question is, can we Re-Utilize variables created by Strategy Builder ?


Also this code was created using Strategy Builder -I want to understand why same period Strategy Builder is creating new Variable
See line # 69 and 70.

Also Strategy Builder is not recognizing that variable

Fast = 5

and EMA1 is created using fast Period ; but still it's creating EMA4 when I supply numeric value 5 to EMA Indicator in Strategy builder.

[NinjaTrader_Jesse]

Hello futtrader,

The variables that are auto created for strategy builder scripts for indicators are just for the builders use in code, you wouldn't reference that directly. To use the ema you would need to select Indicators -> EMA in the condition and select fast or slow for the period. When you use the builder you don't use the code at all, everything is done by using the menus in the condition builder. Each time you use a numeric value that will generate a new variable even if one of your user inputs uses the same value. You can ignore the code completely while using the builder, that would only be relevant if you wanted to unlock the code and manually code it.