Who makes market at preopening hours?

[Vitaly Larichev <vitaly@xxxxxxxxxxxxx>]

Hi everybody,

I recently opened an account with a brokerage with an access to Island (for NASDAQ stocks)
for trading at the preopening hours. As they explain, the  (Island) system works MATCHING
customers' orders. Thius is where my confusion starts. Suppose, the current price of XYZ
equity is $50, and having in mind some magical resistance level at $100 a penetration of
which would make me dirty rich quick, I place a limit order to buy at $101. Then seeing my
order, everybody would love to sell to me his/her shares at $101 instead of current $50.
During normal hours, market makers do the job of helping me to avoid this.
What happens at Island then? If there are market makers at preopening hours, how good are
they to make the market?  Then what does "matching orders"  mean? Is there more danger
dealing with low volume equities at this time as compared to normal hours (this is about
limit orders only)?

Anybody with the experience with Island, please help me to figure out this.

Thanks a lot.

Cheers, Vitaly