ThinkorSwim provides an autotrade service. It works like this. ThinkorSwim maintains a list of newsletters that publish trade recommendations. A customer can sign up for one of the newsletter services and Thinkorswim will then automatically execute the trades of that newsletter. I am interested in hearing the experiences of anyone who has done this.
https://www.thinkorswim.com/tos/displayPage.tos?webpage=autotradePartners&displayFormat=hide#deets
https://www.thinkorswim.com/tos/displayPage.tos?webpage=autotradePartners&displayFormat=hide#deets