This was asked awhile back and only MyTrack came up.. Does anyone know of a firm that offers the OSO, "order sends order" or "one sends other", order type? I enter positions using a stop. Since I can't watch the market all day I'd like the stop loss order to be executed when the entry order is filled. The thought of relying on an Excel to IB DDE sheet, running all day on an unattended machine, to send a stop loss order gives be the willies.