yes, i did use margin to buy stocks, and the negitive number shows on my account home page for few days, but i didn't receive any call from td yet. there are a massege every day, ( for every one) said they has the right to sale your stocks if you own their money.... since i don't know how to read their numbers, to many numbers there, i can't figer out how much money i won them. anyway, it was my mistake, i shouldn't put all my money in stock maket, plus, i am just retired and no any education about investment and experince...thanks for you people's reply, in this way, i knew i am still alive.