if you place a buy limit order at $51 before the stock market opens, and the first tick is $50.50, are you guaranteed to get it at $50.50?
)Quote from rayl:
But do that the definition of "in front of you" means at least:
at the same price but earlier in time at the same market center
or
at the same price but at a different market center which matches where the contra-liquidity is available
or
at a higher price (any market center, assuming it's a Reg NMS protected security).