If you have downloaded trial version of Amibroker you can download quotes via amiquote. Tools>>Auto update quotes (amiquote only). Amiquote downloads data from *****. Here you have 2 choices, ***** Historical to download historical data and ***** Current to download today's data.
Under Amibroker user's guide>>Tutorial>>updating quotes>>how to get quotes, various compatible data sources are given. You may use either of them as per your requirement(but they are very expensive).
If you are looking for EOD data, you may use utilities developed by traderji members like Pankaj (PKJha), cemcompusoft and hemenkapadia, which are available free of cost. I have used GetBhavCopy by hemen kapadia and it works perfectly. You may download the same from his website hemenkapadia dot somee dot com . On same site, he has given help on how to install and run the software (very simple).
To see the data downloaded by GetBhavCopy in Amibroker, you will have to create a new database by clicking on File>>new>>Database and doing settings as explained in attached image. Here I have configured GetBhavCopy to download EOD data in the directory C:\program files\amibroker\BhavCopy
After creation of this new database, every download by GetBhavCopy is to be imported in Amibroker using File>>Import ASCII and then giving path of the latest file downloaded by GetBhavCopy.
To download realtime data, you will first have to decide between which RT data source is ok with you. Realtime data is expensive, involves lot of maintenance and issues related to data cleanliness, etc. and at least I am not using Free RT data. You may browse Amibroker Section in this forum to find more on data sources available. Googling and searching on the net will also help you identify the various options available to you alongwith their prices. Once you subscribe to any of these data sources, they generally issue step by step instruction as to how to import data downloaded by their softwares into Amibroker. It is advisable to opt for the smallest package from the vendor (may be little expensive), check the features and if they suit to your needs then going ahead with yearly subscription.
I hope this helps.
Regards,
Abhay