Map of Boghe on With the institution of SOES, the playing field was leveled between the institutions and the individual traders. Equal access to the markets was now possible. As SOES evolved, it has provided the trader with a greater access to market participation, but it also has some limitations that you must be made aware of. First, to use the SOES route, a stock has to be SOES-eligible. A few stocks on the Nasdaq SmallCap Market are not SOES-eligible. EDATs have key components in their execution software packages that enable a trader to know if the stock is SOES-eligible or not. The next aspect of SOES is tier size. Map of Boghe 2016.