Sway Charts Pro Scripts Documentation
  • Sway Charts Pro User-Defined Indicators
    • Introduction
      • 1.1 Access to the Sway Charts scripting framework (UDI vs UDIX)
      • 1.2 Example UDI code
      • 1.3 Adding a UDI to a chart
      • 1.4 Lifecycle
      • 1.5 Alerts
      • 1.6 Indicator-on-indicator
      • 1.7 Technical note: web workers
      • 1.8 Technical note: dates
    • Initialisation: UDI.onInit()
      • 2.1 Return value from UDI.onInit()
      • 2.2 The plots[] array
      • 2.3 The settingsFields[] array
      • 2.4 Context data passed to UDI.onInit()
    • Calculating data: UDI.onCalculate()
      • 3.1 Reading settings fields
      • 3.2 Input data for the UDI
      • 3.3 Updates of the current bar only
      • 3.4 Calculating output data
      • 3.5 Requesting out-of-band updates
      • 3.6 Technical analysis: moving averages, ATR etc
    • Changes to the chart or parameters
      • 4.1 UDI.onContextChange()
      • 4.2 UDI.onParameterChange()
    • Creating drawings, event markers, and bar highlights
      • 5.1 Creating drawings
      • 5.1.1 Drawing properties
      • 5.2 Creating event markers
      • 5.2.1 Click notifications from event markers
      • 5.3 Creating bar highlights
    • Notifying the user
      • 6.1 Creating toast
      • 6.2 Changing the panel background colour
    • Adding HTML to the chart
      • 7.1 Adding HTML
      • 7.2 Positioning the HTML
      • 7.3 Sending messages from the HTML to the UDI
      • 7.4 Sending messages from the UDI to the HTML
    • Recommended trade
      • 8.0 Recommended trade
    • Other indicator topics
      • 9.1 Collecting external data
      • 9.2 Converting dates to chart time
      • 9.3 Multi-timeframe (MTF) indicators
  • Sway Charts Pro Framework
    • Examples
    • Collections, objects, and properties in the framework
    • Functions in the framework
    • Messages and event handlers
    • Working with candle data
    • Widget HTML and CSS reference
    • Sway.utils and other helper functions
    • Framework error codes
    • Script contexts
    • Sending mail into Sway Charts Pro from outside the platform
    • language variables
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  1. Sway Charts Pro User-Defined Indicators

Introduction

PreviousSway Charts Pro User-Defined IndicatorsNext1.1 Access to the Sway Charts scripting framework (UDI vs UDIX)

Last updated 1 year ago

It's easy to write your own indicators for Figaro charts. User-defined indicators (UDIs) are just Javascript. You can use any editor of your choice, from Notepad to Eclipse or Visual Studio. A UDI typically has only two simple functions, and you can use all the features of the Javascript language. For large complex projects, you can even use an environment such as Typescript or Coffeescript which compiles to produce Javascript.

UDIs can do all the same things as the built-in indicators:

· Plot values in a variety of styles, such as lines, points, histograms, channels, and candles

· Create drawings on the chart, such as rectangles and lines

· Create event markers

· Create bar highlights (changing the colours of specific candles on the chart)

UDIs are web workers and have access to all the standard features of the browser's Javascript environment. For example, they can set timers, and they can read external data such as an economic calendar or trading signals, using XMLHttpRequest or .

You can debug your UDI using the features built into your browser, such as Chrome's Developer Tools.

web sockets