Vletm,
I tried to backfill this data in Amibroker but the chart didn't turn up don't know what's the problem. I called my trading friend and he told me to keep the Time format along with the date ie dd/mm/yyyy hh:mm eg:- 20/01/2019 15:30
So now in the heading part we will have Trading Symbol, Time, Open, High, Low, Close/Price, Volume.
One more thing once the file is saved the name is showing as "NTY19JANFUT.CSV" please make it as "NTY19JANFUT.csv" the last csv should be in small letters.
Please make the necessary corrections and send a new file. Hope this time Amibroker will upload the file.
Waiting for your file.
Thanks & Regards,
Sonjoe Joseph.