So, in the real-time charts I have access to, the stock price is updated every 1 minute.
Let's say, stock XXX's price at 3:24 PM is $65.66, and then at 3:25 PM it jumps up to $65.78. Does this mean:
The last trade made before 3:25 PM was priced at $65.78 and that's what the chart shows?
The average price of all trades made between 3:24 PM and 3:25 PM is $65.78 and that's what the chart shows?
Since, thousands of trades go through every minute, I am wondering what the charts show. While I understand that the "last traded price" is supposed to be the best indicator of the current price of something, I am wondering if the real-time charts online actually follow that or do they average the whole minute?