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Nifty 50 Data from Zerodha (website) and NSE (website)

amitjet
amitjet in General
Hi Zerodha Support team,

I have downloaded Nifty 50 Index data at 1 minute interval from your website using chartiq chart option.
i did the same from NSE https://www.nseindia.com/index-tracker/NIFTY 50 using their chart and exporting data as csv. they dont show ohlc, i assumed it is close value.

when i compare the close values minute by minute from zerodha and nse, they are not matching. What is this discrepancy? How to solve it?

keep in mind. this is NOT captured realtime. this was captured EOD from both sites. 

zerodhaDate						                                             Zerodha_Close	NSE_Date	NSE_close	diff
Wed Jul 30 2025 09:15:00 GMT+0530 (India Standard Time)	24833.05	30-07-2025 09:15	24833.55	0.5
Wed Jul 30 2025 09:16:00 GMT+0530 (India Standard Time)	24841.15	30-07-2025 09:16	24839.5		-1.65
Wed Jul 30 2025 09:17:00 GMT+0530 (India Standard Time)	24852.65	30-07-2025 09:17	24853.8		1.15
Wed Jul 30 2025 09:18:00 GMT+0530 (India Standard Time)	24862.05	30-07-2025 09:18	24861.4		-0.65
Wed Jul 30 2025 09:19:00 GMT+0530 (India Standard Time)	24862.45	30-07-2025 09:19	24862.05	-0.4
  • Sravanthi_bh
    Sravanthi_bh
    Check out this support article for more information on the same.
  • amitjet
    amitjet
    hi @Sravanthi_bh , I have captured the values after market close. around 6pm IST. I am not doing this comparision while live market is on.

    The reason for my comparision is that i am being told by Zerodha on another thread that there could be data mistmaches on websocket and historical data apis. I wanted to check them against the most authentic source - the NSE Exchange.

    I am looking for minute level data accuracy with exchange. I'll also try and grab other platforms data and see if they also face same problem when data is compared to NSE.

    Refer : https://kite.trade/forum/discussion/15351/historical-data-changing-on-30th-second-of-every-minute-for-past-1-candles-data#latest
  • sujith
    sujith
    It will never match because exchange streams hardly a couple of tick in a second over the internet but there could be hundreds of ticks in a second at the exchange. If you want accurate data then you may have to get a TBT data by setting up your infra at the exchange premises and it costs 20lakh+ per annum to set it up.

    You may check out this thread to know more about the difference between chart data for same symbol on different platforms.
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