Each study has Update Mode (see Formula Manager) setting to configure when the study should be recalculated. There are two update modes:
On Each Tick means that the formula will be recalculated each time data feeder triggers new tick event.
On Each Bar means that it will be recalculated on start of each new bar.
Important! Use update on each tick mode for all studies that are critical to real time data, such as MAIN (to display real time data).
Please, be careful using update on each tick mode with highly complex formulas which are require a lot of calculations as this can slow down the application.