@peng.tian =RtGet is a legacy PowerPlusPro function that was retained in the product to ease the migration from Xtra to Eikon. It only allows a subscription to a single real-time field.
=TR function can access both real-time and reference databases, accept an array of fields as input and allow mixing of real-time and reference fields in a single request. It is best if you use it.
Thanks. In terms of performance, is there any difference?