Built-in Tools | NinjaTrader Developer Docs

Indicator Tutorial 5

A major part of the indicator can be reused by other indicators. The application includes tools folder with a set of reusable classes and functions. Indicators can import them via require construction of Javascript.

For example, our EMA can be rewritten as this one:

1 const predef = require("./tools/predef");
2 const EMA = require("./tools/EMA");
3  
4 class ema {
5    init() {
6        this.emaAlgo = EMA(this.props.period);
7    }
8  
9    map(d) {
10        return this.emaAlgo(d.value());
11    }
12 }
13  
14 module.exports = {
15    name: "exampleEma",
16    description: "My EMA",
17    calculator: ema,
18    params: {
19        period: predef.paramSpecs.period(10)
20    },
21    tags: ["My Indicators", predef.tags.MovingAverage],
22    schemeStyles: predef.styles.solidLine("red")
23 };

Source codes of the tools folder are available via the Code Explorer module of the application.