How to set up Alerts on price?

To enable an alert that triggers when the price approaches a line, you need to add a horizontal line to the chart and in the line settings, turn on the "Use alert" option in the Approximation Alert Settings section.

The "Approximation filter" parameter determines the distance in ticks from the line to the price at which the alert will sound. You can also configure other alert triggering options.

You can also set alerts in Smart Tape and in the Order Flow Indicator.

You can also read the article: 

ALERTS