No back fill for spot traderhardrock...I think its only pull data on live
1 min ieod data is available for 21 days through nesttrader data table.
only problem is open value (9.15 min) is incorrect, and sometimes open and high values (both) for the 1st min (9.15)
and one has to correct it manually
btw, never tried for live data, as there is no way (known to me, to say the least) to get live data for both, spot indices along with future and other nse scrips, using RTD.
there are other ways to get N50 and BN 1 min ieod data, but it is difficult to judge, correctness of these data