Use this tool for a couple of scenarios.
If you wish to compare price action at the same point in time on different time frames for the same symbol.
If you wish to compare price action at the same point in time on the same time frame but for different symbols.
This utility ensures you don't have to manually scroll each chart displayed to the same point in time. Instead, it automatically keeps all charts with the indicator added in sync with each other.
As seen in the illustrations above, there is also a vertical line displayed to highlight the same point in time on each chart. This displays as long as you hold down your left mouse button.