Configuring the Highcharts Library slider (stocks)

I have a stock chart of the Highcharts library. How to adjust the position of the right and left slider in the picture. I need that when I click on the “now” button, the left slider moves to today’s date, and the right one is at a distance from it, for example, 3 hours enter image description here

As I understood in this library, the position of the left slider is dancing from the position of the right one. I implemented moving the left slider for the number of seconds I needed. But it’s dancing from the same right-hand runner…