Creating a Strategy Using Decimal inputs

[pborg05]

Hi Team

I have created a strategy where the user inputs the value of the Bollinger Band deviation but where the value is an integer it is not possible to input a decimal. Without decimals the strategy is no where near specific enough as changes in whole numbers makes a huge difference to the strategy. Is it possible to set the input so decimal numbers can be inputted.

Many Thanks

[NinjaTrader_Jim]

Hello pborg05,

Thanks for your post.

Integer variables do not have a decimal portion. Input variables would need to be doubles in order to have a decimal value.

The BollingerBand indicator uses the Period integer input to create the StdDev and SMA indicators that it is based on. This describes the number of bars used, which cannot be a non integer value.

You could consider copying this indicator, adding a double User Defined Input and using that input as a multiplier in the Upper and Lower plot calculations to achieve your goal.

For example:

Upper[0] = sma0 + NumStdDev * stdDev0 * MyDouble;
Middle[0] = sma0;
Lower[0] = sma0 - NumStdDev * stdDev0 * MyDouble;

An indicator can be copied by opening it in the NinjaScript Editor, right clicking in the code editor, and then clicking Save As.

You could also consider modifying the NumStdDev variable so it is a double instead of an integer.

Creating User Defined Inputs - https://ninjatrader.com/support/help...d_input_pa.htm

We look forward to assisting.

[bltdavid]

I have created a strategy where the user inputs the value of the Bollinger Band deviation but where the value is an integer it is not possible to input a decimal. Without decimals the strategy is no where near specific enough as changes in whole numbers makes a huge difference to the strategy. Is it possible to set the input so decimal numbers can be inputted.

Change it to a double.

Did you try that?