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)

You should post your entire Database settings and provide more details like RTD Vendor, Data Plugin info etc.

You seem to generalize and assume everyone is using the same things that you are.