We have a detailed post on charts here, exchange processes millions of transactions every day but as an industry standard, only a snapshot of such transactions/ticks is sent by the exchanges to the data feeds or market tick by tick data, which results in the end user seeing the price of the stock / instrument as an LTP. We show this OHLC data in daily candle as per the exchange data.
Moreover, here is the intra-day chart data for the same scrip on NSE for today, where the high captured in first 5 minutes (09:17) is same as per our charts.
Additionally, you can see that the intra-day chart does not show the day high listed at the top. This is due to the fact that charts at NSE follow the same concept, showing snapshots of transactions rather than each individual transaction.
