well.. Expert advisor.. Generally referred as eas or forex robots do the trade automatically for us.. I've seen many newbies relying on eas . . I was one of them.. And i tried many eas . . Nothing worked for me perfectly.. Instead it emptied my capital.. Luckily it was demo and now i never recommend eas to anyone as they do not know how to react to different situations.. So i prefer manually trading and would like others to do so..