Quote from dagnyt:
Yip,
If the options you are trading are very active, then you have a real chance to trade at your prices - before much time lapses.
But, you are referring to illiquid options with wide markets. Thus, the problem: it'a very unlikely you will get a fill until the underlying asset has changed price by a sufficient amount that the MMs will want to trade one of your orders. That will leave you legged, with little chance of completeing the spread at a favorable price (unless the underlying reverses direction by a significant amount).
I prefer to enter my spread order, knowing it will not get filled unless the underlying moves. But at least, I'll have my complete spread at a price that was acceptable when I entered the order.
Obviously, it's more efficient to trade more liquid options (but, I don't).
Mark
Mark,
I understand I will have only one leg in most of the cases. Since I have a "better" price every time I open the position, will it generate a positive expectancy? I actually don't want my offer be filled by MMs. I expect some stupid traders will jump in to buy or sell at market order to give me a positive expectancy. When I see the MMs change their bid and ask, I will change my order accordingly.

