Quote from FaderTrader:
Ok - well then you don't know what a Limit Order is...
Limit Order = "I want to buy or sell this thing up to (or down to) this price, but not above (below) it."
Market Order = "Get me into or out of this thing at any price."
Limit Orders benefit from price improvement just like Market Orders do.
If the market is moving and you want to get in, then you can put in a limit order for X cents above the offer and hopefully get price improvement. If you went Market in the same scenario, you have no idea where you're getting filled (probably at the top).
Since the specialist fills orders based on Time, Price, Size (in that order), going Market is suboptimal in almost every situation unless you are late to the trigger (Time being the first consideration of the specialist) - in which case you might as well wait for the next opportunity anyway.
This is a good analysis.
One makes money 2 ways...
(1) By trading "mispriced" securities... however you determine this.
(2) Having the bid/ask spread in your favor... just like the Specialist.
Maybe your spread is so small... $0.01 or whatever that it's not a big deal...
But my NYSE spreads are often $0.05 to $0.15...
So the spread gives me about 50% of my profits.
If one uses market or stop orders...
One completely forgoes the profits from #2.
In fact, one PAYS the Specialist or dealer #2... however big or small it might be.
Also, people can and will play games with you market or stop order...
It's a total "license to steal" for the Specialist or dealer...
But he is smart enough to steal only 10% of the time.
For stocks this is black and white...
Always limit orders...
Unless you absolutely must do something in a big hurry.
rm+
