Today TD ameritrade stop lossed me at one increment higher then my stop losses action price. I had a stop loss at .0142 for a stock and they stop lossed me even though the market price didn't go below or at .0142. It stop lossed at .0143. It's not a big deal in this case, because later on in the day, the market price went lower. However, as far as I was aware a stop loss only triggers when the market price drops to your action price or lower. When I emailed TD ameritrade, they told me that the stop loss triggers when the bid hits your action price. But everywhere I read about stop losses, it talks about market price triggering it. Is this guy BS' ing me, or is this normal? Or maybe its just unique to TD Ameritrade. I have a little trouble believing it is supposed to trigger when the bid hits your action price because there can be a great disparity between the bid and the ask throughout the day. What do you guys think?