Toggle the Live Mode on the Trend Widget with an OPC Variable

You can do this in this way:

1. You retrieve an instance of your IQ Trend widget, preferably using shmi.onReady (instead of shmi.ctrl below)
2. You subscribe to an item using the IO Manager (check our scripting demo for examples)
3. You do all of this in a LocalScript that you add to your HMI

const trendWidget = shmi.ctrl(".iq-trend");
if (trendWidget) {
    if (trendWidget.isLive()) {
        trendWidget.setLive(false);
    } else {
        trendWidget.setLive(true);
    }
}