I made a previous posting about trading QQQ on Island and a couple people have commented that QQQ does NOT follow the NDX index, in fact the QQQ price will actually move before the NDX does. They explained this due to the fact professional traders trading QQQ on Island will watch the Nasdaq futures and trade QQQ accordingly, thus moving the QQQ price before the same corresponding mopve happens in the NDX level. I am NOT a professianal trader, but I would like to trade QQQ on Island from a home computer using a cable modem and a realtick interface . MY question is this: Would I gain any advantage at all my subscribing to a Nasdaq futues feed? (the futures quotes cost extra) As a non-professional, would I have any hope of noticing a movement in the Nasdaq futures and buying/selling QQQ on Island, and get a very slight price improvement? Or would the professionals already have acted on the same info and beaten me to the bunch my one second, and already moved the QQQ price enough on Island so that would be impossible for me to gain any advantage looking at Nasdaq futures on a home computer. I suspect the latter is true and that the pros have alerady moved before me, but I want to hear some more educated opinions than mine. I am not trying to make money on momentum movement, I just am looking for a very slight price improvement to basically cover any spread I am paying on the deal. But if there is no point in me watching the futures, I might was well just watch the Island book and see where the prices are moving. I have noticed that if a lot of Island bids are above the prices of the other exchanges like the ASE, the NDX will likely move upward on its next tick. The reverse is also true. I know that info doesn't help me because its already past history by a few seconds, but its interesting to know. Anyway, what is your opinion? Is it worth it for a non-professional trader to bother looking at real time Nasdaq futures quotes to gain a slight price improvement on a QQQ trade on Island?