I tried sell a few shares this afternoon and Ameritrade hosed me.... I sold 100k at .055 and lowered it to .0545 then ameritrade wouldn't clear the transaction it was held up like 5 minutes- on ameritrade you can't cancel the order if its in that transition period. Then I thought well I will sell 50k at .053 because that is all the money I needed and where the bid set... and I could cancel the higher order..... they took all 150k shares... no partials....