Hello,
this increase of the Historical bars is still in test, and I am not sure if it will last.
Anyway, if you want to test it, you need to change the number from the Data Horizon.
There are many updates now in EA Studio, and more are coming up.
So what I will do is to open a new topic in the forum, where I will post videos with every update. This way everyone will keep it up with the updates, and I will explain them in details, because in the help of EA Studio they are written but not really explained.