I checked the Echotrade site and it says they charge .004 per share to trade on ARCA. Now let's say i place an order to buy 1000 shares at the market through ARCA and i get 500 from the ARCA book paying .004 per share. Then i get filled for 200 shares on Island, then a 100 shares on a Selectnet preference to BRUT, and then finally 200 on Supersoes. Now my questions are: do i also pay the Island fee on the 200 shares; do i also pay the Selectnet fees of .10 per order entry and .90 per order execution trading with BRUT, as well the BRUT ECN fees and the .25 Selectnet cancellation fee;do i pay the Supersoes fees of .10 per order entry and the .002 per share executed; and finally am i also paying the .004 ARCA fee on the whole 1000 or just the 500 i got filled from the ARCA book. Any help is appreciated.