Hello Jay-R,
Haliffa gave you great answers! 100% correct.
I have noticed with the time that it is possible to load slowly the chart for two reasons. One is if your computer is very very slow (I do not believe yours is since on Demo it loads fast) and second is from the server of the broker. Could be that they load the data slowly, the server is far from you…anything like that, and in most cases, we can not understand that.
Feel free to ask questions.
It is important to get started properly with the Historical data. That is the first important steps.
Kind regards,