Input[0]

[Skechers]

There is a piece of code in the MACD indicator:

protected override void OnBarUpdate()

{

double input0 = Input[0];
​

What is the Input[0] variable/object? Where does it come from? It seems to be a built in series object?

I searched help but too many results came back.

Thanks, Caesar.

[QuantKey_Bruce]

Input is whatever price the indicator is configured to be based on. You can change this in the indicator's properties. Typically, it's the same as "Close" but you can, for instance, make an SMA of the High, without doing any programming and in that case Input is equal to High.

[QuantKey_Bruce]

When you are writing your own indicator, if you want to make it possible for users to choose the input, make your calculations based on Input which will default to Close. If you want to ignore their choice and do your own thing (such as always using High or Open or whatever) just code it to that series directly and don't refer to Input. It's a good practice to use Input for indicators that require a single series, such as an SMA.

[NinjaTrader_Jesse]

Hello Skechers,

Just to follow up on what was already said about Input, you can find its documentation here: https://ninjatrader.com/support/help.../nt8/input.htm

It is good to take note which indicators use Input in their code, some indicators do not use Input and rely on specific price series. The indicators which do not use input in their code generally won't support inputting other indicator plot values if they use more than just the close price. As mentioned its good practice to use Input in your code if you plan to make the indicator work for all types of input.

Just as a quick example I attached a version of the ADX converted to use input, the default adx does not use input and uses specific price series. This script can help you to see how you might incorporate using input in your own script if you use more than just the Close price.

[Skechers]

Many Thanks Jesse, Bruce!