I haven't tried trading while travelling but for my kind of person the chances are that it's going to be a mess. A lost trade before it even started. Reasons are:

I won't have such depth of concentration as would be required to be sure of what am doing as the ambience along the way would most likely interrupt my concentration. Because I love view the environments when traveling, it makes me relaxed as I get to see certain beautiful views. So it's either home, office or a quiet place but definitely not in transit.