Roberto,
I called today 08.06.2020, ProRealTime Support https://www.prorealtime.com/de/kontakt-kundendienst and the response from the sales support was that the feature will come “soon”, PRT is working on it, but sales support was not able to tell me how soon it will come, “soon” is a not so well defined timeline.
Maybe it would help if more of us would ask Pro Real Time about this feature ?
Or maybe Nicolas can tell more about the prioritizing of ProRealTime regarding this feature (more than one market data for a trading strategy).
KR