To: eichler who wrote (56408 ) 7/12/2000 1:45:11 PM From: eichler Respond to of 99985 To The Thread: Just wanted to pass on the following message I received via PM from Jon Tara regarding my question yesterday about "order preferencing". I found the reply well thought out and I believe it has increased my awareness of aspects of trading. I thought perhaps others might benefit. I haven't figured out yet how to transfer content from one message to say this message so I have to type out the reply....sorry for any typos. It begins... Yes, this sounds like order preferencing. I've done it myself on rare occasion. If you are using a direct-access broker, you can place trades using SelectNet. SelectNet allows you to "preference" a market-maker. That is, you can direct your trade to a specific market-maker. This allows you to buy above the offer. Now, why on earth would you want to buy above the offer. I've done it, should I be committed?:) In a fast moving stock, it is difficult to get in at the offer. You are thrown-in to a "queue". Everybody who has placed an order in front of you will be filled first. If you placed a limit order, the price may tick up before you can be filled. If you placed a market order, you may pay much more than you wanted to. Instead, it is better to preference a MM or ECN that is offering at a HIGHER price. By doing so, you bypass the queue. Let's say a stock is 50 x 50 1/8 and moving fast. You may get stock cheaper by buying from a MM offering at 50 1/4 than by placing a market order, and not getting filled until 50 1/2. If the ask that is sitting there is from a MM, then, yes, they have some rules that will allow then to delay slightly - they only have to do a SOES fill every (15?) seconds, and they have no obligation to honor Selectnet orders. But eventually they will be taken out. Another thing that you might be seeing (or perhaps in combination with the above) is that you may be seeing quote lag. L1 and L2 quotes are on separate feeds from NASDAQ. L1 quotes often lag. The quote you are seeing from the Island book are QUITE up-to-date, and they often lead even the NASDAQ L2 feed. (In Fact, technically, they HAVE to - you are seeing the same quotes that they are providing to NASDAQ. NASDAQ then has to send them back out...)I wouldn't trust the free quotes on SI to be very up-to-date - I'd presume a lag of 1-5 seconds at least. __________________________________________ Anyway, this explanation makes sense to me and sounds feasible. Sorry for the redundancy for those who already know all about this. I'm still a computer newbie (finally joined this technological revolution by getting my first computer in January...better late that never!?) Best wishes for succesful trading to all! Eichler