# Liquid Charts Pro User-Defined Indicators

- [Introduction](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction.md)
- [1.1 Access to the Liquid Charts scripting framework (UDI vs UDIX)](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.1-access-to-the-liquid-charts-scripting-framework-udi-vs-udix.md)
- [1.2	Example UDI code](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.2-example-udi-code.md)
- [1.3	Adding a UDI to a chart](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.3-adding-a-udi-to-a-chart.md)
- [1.4	Lifecycle](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.4-lifecycle.md)
- [1.5	Alerts](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.5-alerts.md)
- [1.6	Indicator-on-indicator](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.6-indicator-on-indicator.md)
- [1.7	Technical note: web workers](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.7-technical-note-web-workers.md)
- [1.8	Technical note: dates](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/introduction/1.8-technical-note-dates.md)
- [Initialisation: UDI.onInit()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/initialisation-udi.oninit.md)
- [2.1	Return value from UDI.onInit()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/initialisation-udi.oninit/2.1-return-value-from-udi.oninit.md)
- [2.2	The plots\[\] array](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/initialisation-udi.oninit/2.2-the-plots-array.md)
- [2.3	The settingsFields\[\] array](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/initialisation-udi.oninit/2.3-the-settingsfields-array.md)
- [2.4	Context data passed to UDI.onInit()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/initialisation-udi.oninit/2.4-context-data-passed-to-udi.oninit.md)
- [Calculating data: UDI.onCalculate()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate.md)
- [3.1	Reading settings fields](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.1-reading-settings-fields.md)
- [3.2	Input data for the UDI](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.2-input-data-for-the-udi.md)
- [3.3	Updates of the current bar only](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.3-updates-of-the-current-bar-only.md)
- [3.4	Calculating output data](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.4-calculating-output-data.md)
- [3.5	Requesting out-of-band updates](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.5-requesting-out-of-band-updates.md)
- [3.6	Technical analysis: moving averages, ATR etc](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/calculating-data-udi.oncalculate/3.6-technical-analysis-moving-averages-atr-etc.md)
- [Changes to the chart or parameters](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/changes-to-the-chart-or-parameters.md)
- [4.1 UDI.onContextChange()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/changes-to-the-chart-or-parameters/4.1-udi.oncontextchange.md)
- [4.2	UDI.onParameterChange()](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/changes-to-the-chart-or-parameters/4.2-udi.onparameterchange.md)
- [Creating drawings, event markers, and bar highlights](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights.md)
- [5.1	Creating drawings](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights/5.1-creating-drawings.md)
- [5.1.1 Drawing properties](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights/5.1.1-drawing-properties.md)
- [5.2	Creating event markers](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights/5.2-creating-event-markers.md)
- [5.2.1	Click notifications from event markers](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights/5.2.1-click-notifications-from-event-markers.md)
- [5.3	Creating bar highlights](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/creating-drawings-event-markers-and-bar-highlights/5.3-creating-bar-highlights.md)
- [Notifying the user](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/notifying-the-user.md)
- [6.1	Creating toast](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/notifying-the-user/6.1-creating-toast.md)
- [6.2	Changing the panel background colour](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/notifying-the-user/6.2-changing-the-panel-background-colour.md)
- [Adding HTML to the chart](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/adding-html-to-the-chart.md)
- [7.1	Adding HTML](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/adding-html-to-the-chart/7.1-adding-html.md)
- [7.2 Positioning the HTML](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/adding-html-to-the-chart/7.2-positioning-the-html.md)
- [7.3	Sending messages from the HTML to the UDI](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/adding-html-to-the-chart/7.3-sending-messages-from-the-html-to-the-udi.md)
- [7.4	Sending messages from the UDI to the HTML](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/adding-html-to-the-chart/7.4-sending-messages-from-the-udi-to-the-html.md)
- [Recommended trade](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/recommended-trade.md)
- [8.0 Recommended trade](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/recommended-trade/8.0-recommended-trade.md)
- [Other indicator topics](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/other-indicator-topics.md)
- [9.1	Collecting external data](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/other-indicator-topics/9.1-collecting-external-data.md)
- [9.2	Converting dates to chart time](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/other-indicator-topics/9.2-converting-dates-to-chart-time.md)
- [9.3	Multi-timeframe (MTF) indicators](/liquid-charts-api-docs/liquid-charts-pro-scripts-documentation/liquid-charts-pro-user-defined-indicators/other-indicator-topics/9.3-multi-timeframe-mtf-indicators.md)
