To answer your question, Chicago’s admission rate continues to decline and is now in the single digits. Your standardized test scores probably should be a minimum of 1450 SAT or 33 ACT to be competitive. The good news is that your performance on standardized tests strongly correlates with time spent in school. As a sophomore, 1190 is quite respectable.
I would also take a timed practice test of the ACT to see how you do. For some students, there is a marked difference between the two formats. For others, their results are equivalent. If you fall into the latter category, focus on preparing for the test that is most comfortable for you. The free SAT prep through Khan Academy is very helpful. ACT has on-line prep resources as well, but they cost a modest sum for access.
Chicago also is moving towards accepting more students in the ED round. “So,” if Chicago remains your first choice when you are a rising senior AND if you talk with your parents beforehand and they can afford it, you might want to consider an ED application to improve your chances.
Good luck!