chuyen qua binh thuong , volum forex la tick( co nghia la 1 nguoi vao lenh la volum da nhay khong can biet khoi luong bao nhieu)
vi du 10 khach le vao 10 lot, nhung bigboy lai vao 30 lot thi volum luc nay se la 11 , nhung khoi luong bigboy lon hon nhieu len gia se nhay theo bigboy chu ko phai...