Pi Excel Code Formula

I need Pi rtdserver formula code for 9.15, 9.30, 9.45 am time price, our other code like - Open, Low, High, LTQ. (=RTD(“pi.rtdserver”, ,“NSE_ABB-EQ”, “Open”)

PI Exports data using DDE. It is like a running ticker. DDE is reference using Server, Topic pair.
DDE is not a database which can be referenced with query or timestamp. Consider it a running ticker. More about this here.

Windows provides several methods for transferring data between applications. One method is to use the Dynamic Data Exchange (DDE) protocol. The DDE protocol is a set of messages and guidelines. It sends messages between applications that share data and uses shared memory to exchange data between applications. Applications can use the DDE protocol for one-time data transfers and for continuous exchanges in which applications send updates to one another as new data becomes available.