Liquid Charts API Docs
Liquid Charts Pro Scripts Documentation
Liquid Charts Pro Scripts Documentation
  • Liquid Charts Pro User-Defined Indicators
    • Introduction
      • 1.1 Access to the Liquid 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
  • Liquid 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
    • Liquid.utils and other helper functions
    • Framework error codes
    • Script contexts
    • Sending mail into Liquid Charts Pro from outside the platform
    • language variables
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  1. Liquid Charts Pro User-Defined Indicators
  2. Introduction

1.1 Access to the Liquid Charts scripting framework (UDI vs UDIX)

When a UDI is added to a chart, it can optionally also be given access to the Liquid Charts scripting framework. This lets it see any framework data such as the order list, and lets it carry out actions such as placing trades. In Liquid Charts terminology, this turns the UDI into a UDIX.

Like anything with framework access, a UDIX can be “not just an indicator”. The ability to place trades means that a UDIX can implement a trading algo, and using the indicator features to draw its activity on the chart.

This guide only covers the core indicator functionality of drawing on the trading chart. The scripting framework is described separately:

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Last updated 3 months ago