market orders = death. I sold PTSC on market order for 0.70. It was 0.85 when I placed the order and like 500 shares sold on bid and over 250,000 shares sold before my remaining 9,500 shares sold. MM's screwed me so bad I almost had an anxiety attack from it. Almost $1,500 !!!!! Never place a market order unless you do not have many shares, spread is less than 1% of the stock price, and trading has been relatively sideways.