In RTD1.50 settings, keep "Hide RTD Window" as don't hide.
Keep minimum scrips in RTD.
open Rtdman.ini and go to [RTDMan] section. -- do ViewRAWdata=1
View attachment 25455
Start RTD in live market.
If RTDMan window does not open, open it from the task bar.
You will see raw data scrolling down in RTDMan window. Send me a screenshot of that. Take care that Spot Nifty data is present in the screen shot.
Also provide which application are you using for trading along with version.