I've never heard of an options daytrader. The spreads and commissions on them make it practically impossible..
Example, if the spread's 10 cents (Which is pretty typical), you're already 10 cents in the hole. Now, assuming $1 / contract (which is fairly low, most ppl pay a lot more then that), you're another 2 cents in the hole (1 on the buy, 1 on the sell). If you're doing an ATM option, delta's around .5, and if the option is expiring soon, you have to worry about theta (intraday theta is fairly low, but that might be another cent, depending on how close it is to expiration).
so, with 13 cents for spreads, commissions, and time decay, you need the stock to move favorably 26 cents to just break even.
Add in the fees for cancel/modify, and just forget about it.
The only way to profit day trading options is to be the market maker, no rediculous cancel/modify fees, and you're on the favorable side of the spread.