Amibroker: Can I have previous day IEOD data from my local and current day's IEOD data from any realtime vendor

Let's say I have tatamotors.csv IEOD data of previous day at my local drive and I want to import that and today's relatime data from any vendor
How can I see both the days data at one chart

Problem is that as I import the previous day's data on amibroker and connect realtime data , I loose the previous days data (here I do not want to take previous day's data from realtime server/vendor)