Abv pic i tried to explain how candle forms from
tick data.
A
candle is most accepted form of chart type.
but you can see how much information we loose in it.
main thing i want to point out here is though we dont see tick data we see the candle ticking all the time till it's TF is filled. this is called as
live data.
The next candle will start when the base tf is completed
there are some data providers who still provide 1min
snapshot data. tht means you will be able to see the candle only when it is completed.
E.g. you will be able to see the first snapshot candle at 9:15:59 am