I was just wondering. I wasnted to place a limit order to buy a stock for Monday morning's open. I was wondering if I could place a gtc order now (it is saturday) or if I had to wait untill the market opened?

-d

Best thing is to wait until the market opens. Placing an order while the market is closed is the equivalent of showing your hand to the dealer in a card game. Good luck!

only i use gtc is when i will not have access to the computer. i put sells and buys both in when gone for the day and i cannot watch

Indeed! Never place an order until you have a chance to see what the market's doing.

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