Another thing people don't realize is if the premarket or when ever is not trading HEAVY volume it's hard to get out.
So at the time I sold a 1000 shares of $ANVS.
The bid was $8.00.
I but in a 7.77 limit order on a 1000 shares.
What do they do?
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They fill you 100 at $7.99 then drop the bid down to $7.77 then you have to wait to get filled.
Now be it this was still premarket and it was only trading a few 100,000 shares of volume.
But that's how hard it is to get out.
That's .33 slippage just to get out premarket.