Originally posted by dotslashfuture
someone made a valid point about a friend being a floor trader and doing well as a scalper. Well, there is hardly any reason to be a floor trader if you are not also a scalper, that is what that game is all about. However, it is a fundamentally different situation than most people find themselves in.
First of all, there is no such thing as truly "realtime" quotes for nyse listed stocks. There is always a delay, and to make matters worse, the delay is not always the same. Part of this delay is inherent in the fact that the prices get set by humans and then must be inputed into the computer, and part of the delay is the system itself ( upstairs traders get the closest to realtime without being on the floor, and if they have a doubt they can get on the phone to someone on the floor. ) Sometimes you may only be delayed a second, and sometimes you might be delayed 5 seconds, and you would not even have a way of knowing it. If you are trying to be true "tape reader" then you are really looking at a composite tape, and in a fast moving market the tape starts to drop information like volume in order to run faster. To you it all looks realtime because you have no frame of reference. It isn't realtime unless you are really there.
The second issue is of course, commissions, since if you are on the floor you don't pay commissions, you pay a flat amount for being there ( buy or lease a seat ), or someone else pays you a salary for being there.
The third issue is order flow. If you are handling order flow coming in from the wire houses then you are flat out running a volume business and you are not doing anything like being a retail trader. If you are a local, then you can get used to how the other guys work and figure out if they have big buy or sell orders and scalp from that.
If you are a guy in a trading room paying commissions, or if you are sitting at home on the internet and paying commissions, then you are at a disadvantage in the game of scalping.
Furthermore, the only way around this is to increase your time frame so that every tick doesn't matter, and so that the brokerage firm doesn't make more money than you do.