Getting Very Limited Custom Charts Data History

 

(I'm not a programmer)...

The broker has plenty of data for me to make a custom symbol and chart (in most cases 20 years or more).

However, when I make the custom chat (from 2 of the broker's charts) it results in only about 9 weeks of data.

Does anyone know if there's a trick or something that will give me more data on my custom chart?

Thanks.